diff --git a/frontend/src/pages/RatioTask/Create/CreateRatioTask.tsx b/frontend/src/pages/RatioTask/Create/CreateRatioTask.tsx
index 2c94f0d..e27b4aa 100644
--- a/frontend/src/pages/RatioTask/Create/CreateRatioTask.tsx
+++ b/frontend/src/pages/RatioTask/Create/CreateRatioTask.tsx
@@ -7,7 +7,6 @@ import { useNavigate } from "react-router";
 import SelectDataset from "@/pages/RatioTask/Create/components/SelectDataset.tsx";
 import BasicInformation from "@/pages/RatioTask/Create/components/BasicInformation.tsx";
 import RatioConfig from "@/pages/RatioTask/Create/components/RatioConfig.tsx";
-import RatioTransfer from "./components/RatioTransfer";
 
 export default function CreateRatioTask() {
   const navigate = useNavigate();
@@ -36,27 +35,12 @@ export default function CreateRatioTask() {
         message.error("请配置配比项");
         return;
       }
-      // Build request payload
-      const ratio_method =
-        ratioTaskForm.ratioType === "dataset" ? "DATASET" : "TAG";
       const totals = String(values.totalTargetCount);
       const config = ratioTaskForm.ratioConfigs.map((c) => {
-        if (ratio_method === "DATASET") {
-          return {
-            datasetId: String(c.source),
-            counts: String(c.quantity ?? 0),
-            filter_conditions: "",
-          };
-        }
-        // TAG mode: source key like `${datasetId}_${label}`
-        const source = String(c.source || "");
-        const idx = source.indexOf("_");
-        const datasetId = idx > 0 ? source.slice(0, idx) : source;
-        const label = idx > 0 ? source.slice(idx + 1) : "";
         return {
-          datasetId,
+          datasetId: c.id,
           counts: String(c.quantity ?? 0),
-          filter_conditions: label ? JSON.stringify({ label }) : "",
+          filterConditions: { label: c.labelFilter, dateRange: String(c.dateRange ?? 0)},
         };
       });
 
@@ -65,7 +49,6 @@ export default function CreateRatioTask() {
         name: values.name,
         description: values.description,
         totals,
-        ratio_method,
         config,
       });
       message.success("配比任务创建成功");
@@ -108,13 +91,6 @@ export default function CreateRatioTask() {
               totalTargetCount={ratioTaskForm.totalTargetCount}
             />
 
-            {/* <RatioTransfer
-              ratioTaskForm={ratioTaskForm}
-              distributions={distributions}
-              updateRatioConfig={updateRatioConfig}
-              updateLabelRatioConfig={updateLabelRatioConfig}
-            /> */}
-
             <div className="flex h-full">
               <SelectDataset
                 selectedDatasets={ratioTaskForm.selectedDatasets}
diff --git a/frontend/src/pages/RatioTask/Create/components/BasicInformation.tsx b/frontend/src/pages/RatioTask/Create/components/BasicInformation.tsx
index e6f6499..af12688 100644
--- a/frontend/src/pages/RatioTask/Create/components/BasicInformation.tsx
+++ b/frontend/src/pages/RatioTask/Create/components/BasicInformation.tsx
@@ -27,7 +27,7 @@ const BasicInformation: React.FC<BasicInformationProps> = ({
         <Input type="number" placeholder="目标总数量" min={1} />
       </Form.Item>
       <Form.Item label="任务描述" name="description" className="col-span-2">
-        <TextArea placeholder="描述配比任务的目的和要求（可选）" rows={2} />
+        <TextArea placeholder="描述配比任务的目的和要求" rows={2} />
       </Form.Item>
     </div>
   );
diff --git a/frontend/src/pages/RatioTask/Create/components/RatioConfig.tsx b/frontend/src/pages/RatioTask/Create/components/RatioConfig.tsx
index ea0ed32..98e5f78 100644
--- a/frontend/src/pages/RatioTask/Create/components/RatioConfig.tsx
+++ b/frontend/src/pages/RatioTask/Create/components/RatioConfig.tsx
@@ -1,7 +1,19 @@
 import React, { useMemo, useState } from "react";
-import { Badge, Card, Input, Progress, Button, Divider } from "antd";
-import { BarChart3 } from "lucide-react";
+import { Badge, Card, Input, Progress, Button, DatePicker, Select } from "antd";
+import { BarChart3, Filter, Clock } from "lucide-react";
 import type { Dataset } from "@/pages/DataManagement/dataset.model.ts";
+import dayjs from 'dayjs';
+
+const { RangePicker } = DatePicker;
+const { Option } = Select;
+
+const TIME_RANGE_OPTIONS = [
+  { label: '最近1天', value: 1 },
+  { label: '最近3天', value: 3 },
+  { label: '最近7天', value: 7 },
+  { label: '最近15天', value: 15 },
+  { label: '最近30天', value: 30 },
+];
 
 interface RatioConfigItem {
   id: string;
@@ -10,6 +22,8 @@ interface RatioConfigItem {
   quantity: number;
   percentage: number;
   source: string;
+  labelFilter?: string;
+  dateRange?: string;
 }
 
 interface RatioConfigProps {
@@ -22,14 +36,18 @@ interface RatioConfigProps {
 }
 
 const RatioConfig: React.FC<RatioConfigProps> = ({
-  ratioType,
-  selectedDatasets,
-  datasets,
-  totalTargetCount,
-  distributions,
-  onChange,
-}) => {
+                                                   ratioType,
+                                                   selectedDatasets,
+                                                   datasets,
+                                                   totalTargetCount,
+                                                   distributions,
+                                                   onChange,
+                                                 }) => {
   const [ratioConfigs, setRatioConfigs] = useState<RatioConfigItem[]>([]);
+  const [datasetFilters, setDatasetFilters] = useState<Record<string, {
+    labelFilter?: string;
+    dateRange?: string;
+  }>>({});
 
   // 配比项总数
   const totalConfigured = useMemo(
@@ -37,6 +55,36 @@ const RatioConfig: React.FC<RatioConfigProps> = ({
     [ratioConfigs]
   );
 
+  // 获取数据集的标签列表
+  const getDatasetLabels = (datasetId: string): string[] => {
+    const dist = distributions[String(datasetId)] || {};
+    return Object.keys(dist);
+  };
+
+  // 自动平均分配
+  const generateAutoRatio = () => {
+    const selectedCount = selectedDatasets.length;
+    if (selectedCount === 0) return;
+    const baseQuantity = Math.floor(totalTargetCount / selectedCount);
+    const remainder = totalTargetCount % selectedCount;
+    const newConfigs = selectedDatasets.map((datasetId, index) => {
+      const dataset = datasets.find((d) => String(d.id) === datasetId);
+      const quantity = baseQuantity + (index < remainder ? 1 : 0);
+      return {
+        id: datasetId,
+        name: dataset?.name || datasetId,
+        type: ratioType,
+        quantity,
+        percentage: Math.round((quantity / totalTargetCount) * 100),
+        source: datasetId,
+        labelFilter: datasetFilters[datasetId]?.labelFilter,
+        dateRange: datasetFilters[datasetId]?.dateRange,
+      };
+    });
+    setRatioConfigs(newConfigs);
+    onChange?.(newConfigs);
+  };
+
   // 更新数据集配比项
   const updateDatasetQuantity = (datasetId: string, quantity: number) => {
     setRatioConfigs((prev) => {
@@ -55,6 +103,8 @@ const RatioConfig: React.FC<RatioConfigProps> = ({
         quantity: Math.min(quantity, totalTargetCount - totalOtherQuantity),
         percentage: Math.round((quantity / totalTargetCount) * 100),
         source: datasetId,
+        labelFilter: datasetFilters[datasetId]?.labelFilter,
+        dateRange: datasetFilters[datasetId]?.dateRange,
       };
 
       let newConfigs;
@@ -69,78 +119,85 @@ const RatioConfig: React.FC<RatioConfigProps> = ({
     });
   };
 
-  // 自动平均分配
-  const generateAutoRatio = () => {
-    const selectedCount = selectedDatasets.length;
-    if (selectedCount === 0) return;
-    const baseQuantity = Math.floor(totalTargetCount / selectedCount);
-    const remainder = totalTargetCount % selectedCount;
-    const newConfigs = selectedDatasets.map((datasetId, index) => {
-      const dataset = datasets.find((d) => String(d.id) === datasetId);
-      const quantity = baseQuantity + (index < remainder ? 1 : 0);
-      return {
-        id: datasetId,
-        name: dataset?.name || datasetId,
-        type: ratioType,
-        quantity,
-        percentage: Math.round((quantity / totalTargetCount) * 100),
-        source: datasetId,
-      };
-    });
-    setRatioConfigs(newConfigs);
-    onChange?.(newConfigs);
-  };
-
-  // 标签模式下，更新某数据集的某个标签的数量
-  const updateLabelQuantity = (
-    datasetId: string,
-    label: string,
-    quantity: number
-  ) => {
-    const sourceKey = `${datasetId}_${label}`;
-    setRatioConfigs((prev) => {
-      const existingIndex = prev.findIndex((c) => c.source === sourceKey);
-      const totalOtherQuantity = prev
-        .filter((c) => c.source !== sourceKey)
-        .reduce((sum, c) => sum + c.quantity, 0);
-      const dist = distributions[datasetId] || {};
-      const labelMax = dist[label] ?? Infinity;
-      const cappedQuantity = Math.max(
-        0,
-        Math.min(quantity, totalTargetCount - totalOtherQuantity, labelMax)
-      );
-      const newConfig: RatioConfigItem = {
-        id: sourceKey,
-        name: label,
-        type: "label",
-        quantity: cappedQuantity,
-        percentage: Math.round((cappedQuantity / totalTargetCount) * 100),
-        source: sourceKey,
-      };
-      let newConfigs;
-      if (existingIndex >= 0) {
-        newConfigs = [...prev];
-        newConfigs[existingIndex] = newConfig;
-      } else {
-        newConfigs = [...prev, newConfig];
+  // 更新筛选条件
+  const updateFilters = (datasetId: string, updates: {
+    labelFilter?: string;
+    dateRange?: [string, string];
+  }) => {
+    setDatasetFilters(prev => ({
+      ...prev,
+      [datasetId]: {
+        ...prev[datasetId],
+        ...updates,
       }
-      onChange?.(newConfigs);
-      return newConfigs;
-    });
+    }));
   };
 
-  // 选中数据集变化时，移除未选中的配比项
+  // 渲染筛选器
+  const renderFilters = (datasetId: string) => {
+    const labels = getDatasetLabels(datasetId);
+    const config = ratioConfigs.find(c => c.source === datasetId);
+    const filters = datasetFilters[datasetId] || {};
+
+    return (
+      <div className="mb-3 p-2 bg-gray-50 rounded">
+        <div className="flex items-center gap-2 mb-2">
+          <Filter size={14} className="text-gray-400" />
+          <span className="text-xs font-medium">筛选条件</span>
+        </div>
+
+        <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
+          <div>
+            <div className="text-xs text-gray-500 mb-1">标签筛选</div>
+            <Select
+              style={{ width: '100%' }}
+              placeholder="选择标签"
+              value={filters.labelFilter}
+              onChange={(value) => updateFilters(datasetId, { labelFilter: value })}
+              allowClear
+              onClear={() => updateFilters(datasetId, { labelFilter: undefined })}
+            >
+              {labels.map(label => (
+                <Option key={label} value={label}>{label}</Option>
+              ))}
+            </Select>
+          </div>
+
+          <div>
+            <div className="text-xs text-gray-500 mb-1">标签更新时间</div>
+            <Select
+              style={{ width: '100%' }}
+              placeholder="选择标签更新时间"
+              value={filters.dateRange}
+              onChange={(dates) => updateFilters(datasetId, { dateRange: dates })}
+              allowClear
+              onClear={() => updateFilters(datasetId, { dateRange: undefined })}
+            >
+              {TIME_RANGE_OPTIONS.map(option => (
+                <Option key={option.value} value={option.value}>
+                  {option.label}
+                </Option>
+              ))}
+            </Select>
+          </div>
+        </div>
+      </div>
+    );
+  };
+
+  // 选中数据集变化时，初始化筛选条件
   React.useEffect(() => {
-    setRatioConfigs((prev) => {
-      const next = prev.filter((c) => {
-        const id = String(c.source);
-        const dsId = id.includes("_") ? id.split("_")[0] : id;
-        return selectedDatasets.includes(dsId);
-      });
-      if (next !== prev) onChange?.(next);
-      return next;
+    const initialFilters: Record<string, any> = {};
+    selectedDatasets.forEach(datasetId => {
+      const config = ratioConfigs.find(c => c.source === datasetId);
+      if (config) {
+        initialFilters[datasetId] = {
+          labelFilter: config.labelFilter,
+          dateRange: config.dateRange,
+        };
+      }
     });
-    // eslint-disable-next-line
+    setDatasetFilters(prev => ({ ...prev, ...initialFilters }));
   }, [selectedDatasets]);
 
   return (
@@ -148,7 +205,7 @@ const RatioConfig: React.FC<RatioConfigProps> = ({
       <div className="flex items-center justify-between p-4 border-bottom">
         <span className="text-sm font-bold">
           配比配置
-          <span className="text-xs text-gray-500">
+          <span className="text-xs text-gray-500 ml-1">
             (已配置:{totalConfigured}/{totalTargetCount}条)
           </span>
         </span>
@@ -170,41 +227,36 @@ const RatioConfig: React.FC<RatioConfigProps> = ({
         <div className="flex-overflow-auto gap-4 p-4">
           {/* 配比预览 */}
           {ratioConfigs.length > 0 && (
-            <div>
-              <div className="p-3 bg-gray-50 rounded-lg">
-                <div className="grid grid-cols-2 gap-4 text-sm">
-                  <div>
-                    <span className="text-gray-500">总配比数量:</span>
-                    <span className="ml-2 font-medium">
-                      {ratioConfigs
-                        .reduce((sum, config) => sum + config.quantity, 0)
-                        .toLocaleString()}
-                    </span>
-                  </div>
-                  <div>
-                    <span className="text-gray-500">目标数量:</span>
-                    <span className="ml-2 font-medium">
-                      {totalTargetCount.toLocaleString()}
-                    </span>
-                  </div>
-                  <div>
-                    <span className="text-gray-500">配比项目:</span>
-                    <span className="ml-2 font-medium">
-                      {ratioConfigs.length}个
-                    </span>
-                  </div>
+            <div className="p-3 bg-gray-50 rounded-lg mb-4">
+              <div className="grid grid-cols-2 gap-4 text-sm">
+                <div>
+                  <span className="text-gray-500">总配比数量:</span>
+                  <span className="ml-2 font-medium">
+                    {ratioConfigs
+                      .reduce((sum, config) => sum + config.quantity, 0)
+                      .toLocaleString()}
+                  </span>
+                </div>
+                <div>
+                  <span className="text-gray-500">目标数量:</span>
+                  <span className="ml-2 font-medium">
+                    {totalTargetCount.toLocaleString()}
+                  </span>
                 </div>
               </div>
             </div>
           )}
-          <div className="flex-1 overflow-auto">
+
+          <div className="flex-1 overflow-auto space-y-4">
             {selectedDatasets.map((datasetId) => {
               const dataset = datasets.find((d) => String(d.id) === datasetId);
               const config = ratioConfigs.find((c) => c.source === datasetId);
               const currentQuantity = config?.quantity || 0;
+
               if (!dataset) return null;
+
               return (
-                <Card key={datasetId} size="small" className="mb-2">
+                <Card key={datasetId} size="small" className="mb-4">
                   <div className="flex items-center justify-between mb-3">
                     <div className="flex items-center gap-2">
                       <span className="font-medium text-sm">
@@ -216,97 +268,36 @@ const RatioConfig: React.FC<RatioConfigProps> = ({
                       {config?.percentage || 0}%
                     </div>
                   </div>
-                  {ratioType === "dataset" ? (
-                    <div>
-                      <div className="flex items-center gap-2 mb-2">
-                        <span className="text-xs">数量:</span>
-                        <Input
-                          type="number"
-                          value={currentQuantity}
-                          onChange={(e) =>
-                            updateDatasetQuantity(
-                              datasetId,
-                              Number(e.target.value)
-                            )
-                          }
-                          style={{ width: 80 }}
-                          min={0}
-                          max={Math.min(
-                            dataset.fileCount || 0,
-                            totalTargetCount
-                          )}
-                        />
-                        <span className="text-xs text-gray-500">条</span>
-                      </div>
-                      <Progress
-                        percent={Math.round(
-                          (currentQuantity / totalTargetCount) * 100
-                        )}
-                        size="small"
-                      />
-                    </div>
-                  ) : (
-                    <div>
-                      {!distributions[String(dataset.id)] ? (
-                        <div className="text-xs text-gray-400">
-                          加载标签分布...
-                        </div>
-                      ) : Object.entries(distributions[String(dataset.id)])
-                          .length === 0 ? (
-                        <div className="text-xs text-gray-400">
-                          该数据集暂无标签
-                        </div>
-                      ) : (
-                        <div className="flex flex-col gap-2">
-                          {Object.entries(
-                            distributions[String(dataset.id)]
-                          ).map(([label, count]) => {
-                            const sourceKey = `${datasetId}_${label}`;
-                            const labelConfig = ratioConfigs.find(
-                              (c) => c.source === sourceKey
-                            );
-                            const labelQuantity = labelConfig?.quantity || 0;
-                            return (
-                              <div
-                                key={label}
-                                className="flex items-center justify-between gap-2"
-                              >
-                                <div className="flex items-center gap-2">
-                                  <Badge color="gray">{label}</Badge>
-                                  <span className="text-xs text-gray-500">
-                                    {count}条
-                                  </span>
-                                </div>
-                                <div className="flex items-center gap-2">
-                                  <span className="text-xs">数量:</span>
-                                  <Input
-                                    type="number"
-                                    value={labelQuantity}
-                                    onChange={(e) =>
-                                      updateLabelQuantity(
-                                        datasetId,
-                                        label,
-                                        Number(e.target.value)
-                                      )
-                                    }
-                                    style={{ width: 80 }}
-                                    min={0}
-                                    max={Math.min(
-                                      Number(count) || 0,
-                                      totalTargetCount
-                                    )}
-                                  />
-                                  <span className="text-xs text-gray-500">
-                                    条
-                                  </span>
-                                </div>
-                              </div>
-                            );
-                          })}
-                        </div>
+
+                  {/* 筛选条件 */}
+                  {renderFilters(datasetId)}
+
+                  <div className="flex items-center gap-2 mb-2">
+                    <span className="text-xs">数量:</span>
+                    <Input
+                      type="number"
+                      value={currentQuantity}
+                      onChange={(e) =>
+                        updateDatasetQuantity(
+                          datasetId,
+                          Number(e.target.value)
+                        )
+                      }
+                      style={{ width: 100 }}
+                      min={0}
+                      max={Math.min(
+                        dataset.fileCount || 0,
+                        totalTargetCount
                       )}
-                    </div>
-                  )}
+                    />
+                    <span className="text-xs text-gray-500">条</span>
+                  </div>
+                  <Progress
+                    percent={Math.round(
+                      (currentQuantity / totalTargetCount) * 100
+                    )}
+                    size="small"
+                  />
                 </Card>
               );
             })}
diff --git a/frontend/src/pages/RatioTask/Create/components/RatioTransfer.tsx b/frontend/src/pages/RatioTask/Create/components/RatioTransfer.tsx
deleted file mode 100644
index d182725..0000000
--- a/frontend/src/pages/RatioTask/Create/components/RatioTransfer.tsx
+++ /dev/null
@@ -1,169 +0,0 @@
-import React, { useMemo } from "react";
-import { Table } from "antd";
-import { TransferItem } from "antd/es/transfer";
-import RatioConfig from "./RatioConfig";
-import useFetchData from "@/hooks/useFetchData";
-import { queryDatasetsUsingGet } from "@/pages/DataManagement/dataset.api";
-import {
-  datasetTypeMap,
-  mapDataset,
-} from "@/pages/DataManagement/dataset.const";
-import { SearchControls } from "@/components/SearchControls";
-
-const leftColumns = [
-  {
-    dataIndex: "name",
-    title: "名称",
-    ellipsis: true,
-  },
-  {
-    dataIndex: "datasetType",
-    title: "类型",
-    ellipsis: true,
-    width: 100,
-    render: (type: string) => datasetTypeMap[type].label,
-  },
-  {
-    dataIndex: "size",
-    title: "大小",
-    width: 100,
-    ellipsis: true,
-  },
-];
-
-export default function RatioTransfer(props: {
-  distributions: Record<string, Record<string, number>>;
-  ratioTaskForm: any;
-  updateRatioConfig: (datasetId: string, quantity: number) => void;
-  updateLabelRatioConfig: (
-    datasetId: string,
-    label: string,
-    quantity: number
-  ) => void;
-}) {
-  const {
-    updateLabelRatioConfig,
-    updateRatioConfig,
-    ratioTaskForm,
-    distributions,
-  } = props;
-  const {
-    tableData: datasets,
-    loading,
-    pagination,
-    searchParams,
-    setSearchParams,
-    handleFiltersChange,
-  } = useFetchData(queryDatasetsUsingGet, mapDataset);
-
-  const [selectedDatasets, setSelectedDatasets] = React.useState<
-    TransferItem[]
-  >([]);
-
-  const selectedRowKeys = useMemo(() => {
-    return selectedDatasets.map((item) => item.key);
-  }, [selectedDatasets]);
-
-  const [listDisabled, setListDisabled] = React.useState(false);
-
-  const generateAutoRatio = () => {
-    const selectedCount = ratioTaskForm.selectedDatasets.length;
-    if (selectedCount === 0) return;
-
-    const baseQuantity = Math.floor(
-      ratioTaskForm.totalTargetCount / selectedCount
-    );
-    const remainder = ratioTaskForm.totalTargetCount % selectedCount;
-
-    const newConfigs = ratioTaskForm.selectedDatasets.map(
-      (datasetId, index) => {
-        const quantity = baseQuantity + (index < remainder ? 1 : 0);
-        return {
-          id: datasetId,
-          name: datasetId,
-          type: ratioTaskForm.ratioType,
-          quantity,
-          percentage: Math.round(
-            (quantity / ratioTaskForm.totalTargetCount) * 100
-          ),
-          source: datasetId,
-        };
-      }
-    );
-    setRatioTaskForm((prev) => ({ ...prev, ratioConfigs: newConfigs }));
-  };
-
-  return (
-    <div className="flex">
-      <div className="border-card flex-1 mr-4">
-        <h3 className="p-2 border-bottom">{`${selectedDatasets.length} / ${datasets.length} 项`}</h3>
-        <SearchControls
-          searchTerm={searchParams.keyword}
-          onSearchChange={(keyword) =>
-            setSearchParams({ ...searchParams, keyword })
-          }
-          searchPlaceholder="搜索数据集名称..."
-          filters={[
-            {
-              key: "type",
-              label: "数据集类型",
-              options: [
-                { value: "dataset", label: "按数据集" },
-                { value: "tag", label: "按标签" },
-              ],
-            },
-          ]}
-          onFiltersChange={handleFiltersChange}
-          onClearFilters={() =>
-            setSearchParams({ ...searchParams, filter: {} })
-          }
-          showViewToggle={false}
-          showReload={false}
-          className="m-4"
-        />
-        <Table
-          rowSelection={{
-            onChange: (_, selectedRows) => {
-              setSelectedDatasets(selectedRows);
-            },
-            selectedRowKeys,
-            selections: [
-              Table.SELECTION_ALL,
-              Table.SELECTION_INVERT,
-              Table.SELECTION_NONE,
-            ],
-          }}
-          columns={leftColumns}
-          dataSource={datasets}
-          loading={loading}
-          pagination={pagination}
-          size="small"
-          rowKey="id"
-          style={{ pointerEvents: listDisabled ? "none" : undefined }}
-          onRow={(record) => ({
-            onClick: () => {
-              if (record.disabled || listDisabled) {
-                return;
-              }
-              setSelectedDatasets((prev) => {
-                if (prev.includes(record.key)) {
-                  return prev.filter((k) => k !== record.key);
-                }
-                return [...prev, record.key];
-              });
-            },
-          })}
-        />
-      </div>
-      <div className="border-card flex-1">
-        <RatioConfig
-          datasets={selectedDatasets}
-          ratioTaskForm={ratioTaskForm}
-          distributions={distributions}
-          onUpdateDatasetQuantity={updateRatioConfig}
-          onUpdateLabelQuantity={updateLabelRatioConfig}
-        />
-      </div>
-    </div>
-  );
-}
diff --git a/frontend/src/pages/RatioTask/Create/components/SelectDataset.tsx b/frontend/src/pages/RatioTask/Create/components/SelectDataset.tsx
index c99018e..ef04988 100644
--- a/frontend/src/pages/RatioTask/Create/components/SelectDataset.tsx
+++ b/frontend/src/pages/RatioTask/Create/components/SelectDataset.tsx
@@ -1,5 +1,5 @@
 import React, { useEffect, useState } from "react";
-import { Badge, Button, Card, Checkbox, Input, Pagination, Select } from "antd";
+import { Badge, Button, Card, Checkbox, Input, Pagination } from "antd";
 import { Search as SearchIcon } from "lucide-react";
 import type { Dataset } from "@/pages/DataManagement/dataset.model.ts";
 import {
@@ -10,8 +10,6 @@ import {
 
 interface SelectDatasetProps {
   selectedDatasets: string[];
-  ratioType: "dataset" | "label";
-  onRatioTypeChange: (val: "dataset" | "label") => void;
   onSelectedDatasetsChange: (next: string[]) => void;
   onDistributionsChange?: (
     next: Record<string, Record<string, number>>
@@ -21,8 +19,6 @@ interface SelectDatasetProps {
 
 const SelectDataset: React.FC<SelectDatasetProps> = ({
   selectedDatasets,
-  ratioType,
-  onRatioTypeChange,
   onSelectedDatasetsChange,
   onDistributionsChange,
   onDatasetsChange,
@@ -62,7 +58,7 @@ const SelectDataset: React.FC<SelectDatasetProps> = ({
   // Fetch label distributions when in label mode
   useEffect(() => {
     const fetchDistributions = async () => {
-      if (ratioType !== "label" || !datasets?.length) return;
+      if (!datasets?.length) return;
       const idsToFetch = datasets
         .map((d) => String(d.id))
         .filter((id) => !distributions[id]);
@@ -147,7 +143,7 @@ const SelectDataset: React.FC<SelectDatasetProps> = ({
     };
     fetchDistributions();
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [ratioType, datasets]);
+  }, [datasets]);
 
   const onToggleDataset = (datasetId: string, checked: boolean) => {
     if (checked) {
@@ -180,18 +176,6 @@ const SelectDataset: React.FC<SelectDatasetProps> = ({
         </Button>
       </div>
       <div className="flex-overflow-auto gap-4 p-4">
-        <div className="flex items-center gap-4">
-          <span className="text-sm">配比方式:</span>
-          <Select
-            className="flex-1 min-w-[120px]"
-            value={ratioType}
-            onChange={(v) => onRatioTypeChange(v)}
-            options={[
-              { label: "按数据集", value: "dataset" },
-              { label: "按标签", value: "label" },
-            ]}
-          />
-        </div>
         <Input
           prefix={<SearchIcon className="text-gray-400" />}
           placeholder="搜索数据集"
@@ -239,32 +223,30 @@ const SelectDataset: React.FC<SelectDatasetProps> = ({
                         <span>{dataset.fileCount}条</span>
                         <span>{dataset.size}</span>
                       </div>
-                      {ratioType === "label" && (
-                        <div className="mt-2">
-                          {distributions[idStr] ? (
-                            Object.entries(distributions[idStr]).length > 0 ? (
-                              <div className="flex flex-wrap gap-2 text-xs">
-                                {Object.entries(distributions[idStr])
-                                  .slice(0, 8)
-                                  .map(([tag, count]) => (
-                                    <Badge
-                                      key={tag}
-                                      color="gray"
-                                    >{`${tag}: ${count}`}</Badge>
-                                  ))}
-                              </div>
-                            ) : (
-                              <div className="text-xs text-gray-400">
-                                未检测到标签分布
-                              </div>
-                            )
+                      <div className="mt-2">
+                        {distributions[idStr] ? (
+                          Object.entries(distributions[idStr]).length > 0 ? (
+                            <div className="flex flex-wrap gap-2 text-xs">
+                              {Object.entries(distributions[idStr])
+                                .slice(0, 8)
+                                .map(([tag, count]) => (
+                                  <Badge
+                                    key={tag}
+                                    color="gray"
+                                  >{`${tag}: ${count}`}</Badge>
+                                ))}
+                            </div>
                           ) : (
                             <div className="text-xs text-gray-400">
-                              加载标签分布...
+                              未检测到标签分布
                             </div>
-                          )}
-                        </div>
-                      )}
+                          )
+                        ) : (
+                          <div className="text-xs text-gray-400">
+                            加载标签分布...
+                          </div>
+                        )}
+                      </div>
                     </div>
                   </div>
                 </Card>
diff --git a/runtime/datamate-python/app/module/shared/schema/__init__.py b/runtime/datamate-python/app/module/shared/schema/__init__.py
index 88cf3b0..f0c2765 100644
--- a/runtime/datamate-python/app/module/shared/schema/__init__.py
+++ b/runtime/datamate-python/app/module/shared/schema/__init__.py
@@ -1,11 +1,13 @@
 from .common import (
     BaseResponseModel,
     StandardResponse,
-    PaginatedData
+    PaginatedData,
+    TaskStatus
 )
 
 __all__ = [
     "BaseResponseModel",
     "StandardResponse",
-    "PaginatedData"
-]
\ No newline at end of file
+    "PaginatedData",
+    "TaskStatus"
+]
diff --git a/runtime/datamate-python/app/module/shared/schema/common.py b/runtime/datamate-python/app/module/shared/schema/common.py
index c79231a..beaf1c7 100644
--- a/runtime/datamate-python/app/module/shared/schema/common.py
+++ b/runtime/datamate-python/app/module/shared/schema/common.py
@@ -1,8 +1,9 @@
 """
 通用响应模型
 """
-from typing import Generic, TypeVar, Optional, List, Type
+from typing import Generic, TypeVar, List
 from pydantic import BaseModel, Field
+from enum import Enum
 
 # 定义泛型类型变量
 T = TypeVar('T')
@@ -16,7 +17,7 @@ def to_camel(string: str) -> str:
 
 class BaseResponseModel(BaseModel):
     """基础响应模型，启用别名生成器"""
-    
+
     class Config:
         populate_by_name = True
         alias_generator = to_camel
@@ -24,7 +25,7 @@ class BaseResponseModel(BaseModel):
 class StandardResponse(BaseResponseModel, Generic[T]):
     """
     标准API响应格式
-    
+
     所有API端点应返回此格式，确保响应的一致性
     """
     code: int = Field(..., description="HTTP状态码")
@@ -42,3 +43,9 @@ class PaginatedData(BaseResponseModel, Generic[T]):
     total_elements: int = Field(..., description="总条数")
     total_pages: int = Field(..., description="总页数")
     content: List[T] = Field(..., description="当前页数据")
+
+class TaskStatus(Enum):
+    PENDING = "PENDING"
+    RUNNING = "RUNNING"
+    COMPLETED = "COMPLETED"
+    FAILED = "FAILED"
diff --git a/runtime/datamate-python/app/module/synthesis/interface/ratio_task.py b/runtime/datamate-python/app/module/synthesis/interface/ratio_task.py
index acc262a..a67c5f7 100644
--- a/runtime/datamate-python/app/module/synthesis/interface/ratio_task.py
+++ b/runtime/datamate-python/app/module/synthesis/interface/ratio_task.py
@@ -12,7 +12,7 @@ from app.core.logging import get_logger
 from app.db.models import Dataset
 from app.db.session import get_db
 from app.module.dataset import DatasetManagementService
-from app.module.shared.schema import StandardResponse
+from app.module.shared.schema import StandardResponse, TaskStatus
 from app.module.synthesis.schema.ratio_task import (
     CreateRatioTaskResponse,
     CreateRatioTaskRequest,
@@ -49,52 +49,18 @@ async def create_ratio_task(
 
         await valid_exists(db, req)
 
-        # 创建目标数据集：名称使用“<任务名称>-配比生成-时间戳”
-        target_dataset_name = f"{req.name}-配比生成-{datetime.now().strftime('%Y%m%d%H%M%S')}"
+        target_dataset = await create_target_dataset(db, req, source_types)
 
-        target_type = get_target_dataset_type(source_types)
+        instance = await create_ratio_instance(db, req, target_dataset)
 
-        target_dataset = Dataset(
-            id=str(uuid.uuid4()),
-            name=target_dataset_name,
-            description=req.description or "",
-            dataset_type=target_type,
-            status="DRAFT",
-        )
-        target_dataset.path = f"/dataset/{target_dataset.id}"
-        db.add(target_dataset)
-        await db.flush()  # 获取 target_dataset.id
-
-        service = RatioTaskService(db)
-        instance = await service.create_task(
-            name=req.name,
-            description=req.description,
-            totals=int(req.totals),
-            ratio_method=req.ratio_method,
-            config=[
-                {
-                    "dataset_id": item.dataset_id,
-                    "counts": int(item.counts),
-                    "filter_conditions": item.filter_conditions,
-                }
-                for item in req.config
-            ],
-            target_dataset_id=target_dataset.id,
-        )
-
-        # 异步执行配比任务（支持 DATASET / TAG）
         asyncio.create_task(RatioTaskService.execute_dataset_ratio_task(instance.id))
 
-        return StandardResponse(
-            code=200,
-            message="success",
-            data=CreateRatioTaskResponse(
+        response_data = CreateRatioTaskResponse(
                 id=instance.id,
                 name=instance.name,
                 description=instance.description,
                 totals=instance.totals or 0,
-                ratio_method=instance.ratio_method or req.ratio_method,
-                status=instance.status or "PENDING",
+                status=instance.status or TaskStatus.PENDING.name,
                 config=req.config,
                 targetDataset=TargetDatasetInfo(
                     id=str(target_dataset.id),
@@ -103,6 +69,10 @@ async def create_ratio_task(
                     status=str(target_dataset.status),
                 )
             )
+        return StandardResponse(
+            code=200,
+            message="success",
+            data=response_data
         )
     except HTTPException:
         await db.rollback()
@@ -113,6 +83,46 @@ async def create_ratio_task(
         raise HTTPException(status_code=500, detail="Internal server error")
 
 
+async def create_ratio_instance(db, req: CreateRatioTaskRequest, target_dataset: Dataset) -> RatioInstance:
+    service = RatioTaskService(db)
+    logger.info(f"create_ratio_instance: {req}")
+    instance = await service.create_task(
+        name=req.name,
+        description=req.description,
+        totals=int(req.totals),
+        config=[
+            {
+                "dataset_id": item.dataset_id,
+                "counts": int(item.counts),
+                "filter_conditions": item.filter_conditions,
+            }
+            for item in req.config
+        ],
+        target_dataset_id=target_dataset.id,
+    )
+    return instance
+
+
+async def create_target_dataset(db, req: CreateRatioTaskRequest, source_types: set[str]) -> Dataset:
+    # 创建目标数据集：名称使用“<任务名称>-时间戳”
+    target_dataset_name = f"{req.name}-{datetime.now().strftime('%Y%m%d%H%M%S')}"
+
+    target_type = get_target_dataset_type(source_types)
+    target_dataset_id = uuid.uuid4()
+
+    target_dataset = Dataset(
+        id=str(target_dataset_id),
+        name=target_dataset_name,
+        description=req.description or "",
+        dataset_type=target_type,
+        status="DRAFT",
+        path=f"/dataset/{target_dataset_id}",
+    )
+    db.add(target_dataset)
+    await db.flush()  # 获取 target_dataset.id
+    return target_dataset
+
+
 @router.get("", response_model=StandardResponse[PagedRatioTaskResponse], status_code=200)
 async def list_ratio_tasks(
     page: int = 1,
diff --git a/runtime/datamate-python/app/module/synthesis/schema/ratio_task.py b/runtime/datamate-python/app/module/synthesis/schema/ratio_task.py
index 743eb00..a781829 100644
--- a/runtime/datamate-python/app/module/synthesis/schema/ratio_task.py
+++ b/runtime/datamate-python/app/module/synthesis/schema/ratio_task.py
@@ -2,10 +2,36 @@ from typing import List, Optional, Dict, Any
 from datetime import datetime
 from pydantic import BaseModel, Field, field_validator
 
+from app.core.logging import get_logger
+from app.module.shared.schema.common import TaskStatus
+
+logger = get_logger(__name__)
+
+class FilterCondition(BaseModel):
+    date_range: Optional[str] = Field(None, description="数据范围", alias="dateRange")
+    label: Optional[str] = Field(None, description="标签")
+
+    @field_validator("date_range")
+    @classmethod
+    def validate_date_range(cls, v: Optional[str]) -> Optional[str]:
+        # ensure it's a numeric string if provided
+        if not v:
+            return v
+        try:
+            int(v)
+            return v
+        except (ValueError, TypeError) as e:
+            raise ValueError("date_range must be a numeric string")
+
+    class Config:
+        # allow population by field name when constructing model programmatically
+        validate_by_name = True
+
+
 class RatioConfigItem(BaseModel):
     dataset_id: str = Field(..., alias="datasetId", description="数据集id")
     counts: str = Field(..., description="数量")
-    filter_conditions: str = Field(..., description="过滤条件")
+    filter_conditions: FilterCondition = Field(..., alias="filterConditions", description="过滤条件")
 
     @field_validator("counts")
     @classmethod
@@ -22,17 +48,8 @@ class CreateRatioTaskRequest(BaseModel):
     name: str = Field(..., description="名称")
     description: Optional[str] = Field(None, description="描述")
     totals: str = Field(..., description="目标数量")
-    ratio_method: str = Field(..., description="配比方式", alias="ratio_method")
     config: List[RatioConfigItem] = Field(..., description="配比设置列表")
 
-    @field_validator("ratio_method")
-    @classmethod
-    def validate_ratio_method(cls, v: str) -> str:
-        allowed = {"TAG", "DATASET"}
-        if v not in allowed:
-            raise ValueError(f"ratio_method must be one of {allowed}")
-        return v
-
     @field_validator("totals")
     @classmethod
     def validate_totals(cls, v: str) -> str:
@@ -58,8 +75,7 @@ class CreateRatioTaskResponse(BaseModel):
     name: str
     description: Optional[str] = None
     totals: int
-    ratio_method: str
-    status: str
+    status: TaskStatus
     # echoed config
     config: List[RatioConfigItem]
     # created dataset
diff --git a/runtime/datamate-python/app/module/synthesis/service/ratio_task.py b/runtime/datamate-python/app/module/synthesis/service/ratio_task.py
index c26c987..bd55061 100644
--- a/runtime/datamate-python/app/module/synthesis/service/ratio_task.py
+++ b/runtime/datamate-python/app/module/synthesis/service/ratio_task.py
@@ -14,6 +14,8 @@ from app.db.models.ratio_task import RatioInstance, RatioRelation
 from app.db.models import Dataset, DatasetFiles
 from app.db.session import AsyncSessionLocal
 from app.module.dataset.schema.dataset_file import DatasetFileTag
+from app.module.shared.schema import TaskStatus
+from app.module.synthesis.schema.ratio_task import FilterCondition
 
 logger = get_logger(__name__)
 
@@ -30,7 +32,6 @@ class RatioTaskService:
         name: str,
         description: Optional[str],
         totals: int,
-        ratio_method: str,
         config: List[Dict[str, Any]],
         target_dataset_id: Optional[str] = None,
     ) -> RatioInstance:
@@ -38,12 +39,11 @@ class RatioTaskService:
 
         config item format: {"dataset_id": str, "counts": int, "filter_conditions": str}
         """
-        logger.info(f"Creating ratio task: name={name}, method={ratio_method}, totals={totals}, items={len(config or [])}")
+        logger.info(f"Creating ratio task: name={name}, totals={totals}, items={len(config or [])}")
 
         instance = RatioInstance(
             name=name,
             description=description,
-            ratio_method=ratio_method,
             totals=totals,
             target_dataset_id=target_dataset_id,
             status="PENDING",
@@ -56,8 +56,12 @@ class RatioTaskService:
                 ratio_instance_id=instance.id,
                 source_dataset_id=item.get("dataset_id"),
                 counts=int(item.get("counts", 0)),
-                filter_conditions=item.get("filter_conditions"),
+                filter_conditions=json.dumps({
+                    'date_range': item.get("filter_conditions").date_range,
+                    'label': item.get("filter_conditions").label,
+                })
             )
+            logger.info(f"Relation created: {relation.id}, {relation}, {item}, {config}")
             self.db.add(relation)
 
         await self.db.commit()
@@ -97,94 +101,17 @@ class RatioTaskService:
                 relations: List[RatioRelation] = list(rel_res.scalars().all())
 
                 # Mark running
-                instance.status = "RUNNING"
-
-                if instance.ratio_method not in {"DATASET", "TAG"}:
-                    logger.info(f"Instance {instance_id} ratio_method={instance.ratio_method} not supported yet")
-                    instance.status = "SUCCESS"
-                    return
+                instance.status = TaskStatus.RUNNING.name
 
                 # Load target dataset
                 ds_res = await session.execute(select(Dataset).where(Dataset.id == instance.target_dataset_id))
                 target_ds: Optional[Dataset] = ds_res.scalar_one_or_none()
                 if not target_ds:
                     logger.error(f"Target dataset not found for instance {instance_id}")
-                    instance.status = "FAILED"
+                    instance.status = TaskStatus.FAILED.name
                     return
 
-                # Preload existing target file paths for deduplication
-                existing_path_rows = await session.execute(
-                    select(DatasetFiles.file_path).where(DatasetFiles.dataset_id == target_ds.id)
-                )
-                existing_paths = set(p for p in existing_path_rows.scalars().all() if p)
-
-                added_count = 0
-                added_size = 0
-
-                for rel in relations:
-                    if not rel.source_dataset_id or not rel.counts or rel.counts <= 0:
-                        continue
-
-                    # Fetch all files for the source dataset (ACTIVE only)
-                    files_res = await session.execute(
-                        select(DatasetFiles).where(
-                            DatasetFiles.dataset_id == rel.source_dataset_id,
-                            DatasetFiles.status == "ACTIVE",
-                        )
-                    )
-                    files = list(files_res.scalars().all())
-
-                    # TAG mode: filter by tags according to relation.filter_conditions
-                    if instance.ratio_method == "TAG":
-                        required_tags = RatioTaskService._parse_required_tags(rel.filter_conditions)
-                        if required_tags:
-                            files = [f for f in files if RatioTaskService._file_contains_tags(f, required_tags)]
-
-                    if not files:
-                        continue
-
-                    pick_n = min(rel.counts or 0, len(files))
-                    chosen = random.sample(files, pick_n) if pick_n < len(files) else files
-
-                    # Copy into target dataset with de-dup by target path
-                    for f in chosen:
-                        src_path = f.file_path
-                        new_path = src_path
-                        needs_copy = False
-                        src_prefix = f"/dataset/{rel.source_dataset_id}"
-                        if isinstance(src_path, str) and src_path.startswith(src_prefix):
-                            dst_prefix = f"/dataset/{target_ds.id}"
-                            new_path = src_path.replace(src_prefix, dst_prefix, 1)
-                            needs_copy = True
-
-                        # De-dup by target path
-                        if new_path in existing_paths:
-                            continue
-
-                        # Perform copy only when needed
-                        if needs_copy:
-                            dst_dir = os.path.dirname(new_path)
-                            await asyncio.to_thread(os.makedirs, dst_dir, exist_ok=True)
-                            await asyncio.to_thread(shutil.copy2, src_path, new_path)
-
-                        new_file = DatasetFiles(
-                            dataset_id=target_ds.id,  # type: ignore
-                            file_name=f.file_name,
-                            file_path=new_path,
-                            file_type=f.file_type,
-                            file_size=f.file_size,
-                            check_sum=f.check_sum,
-                            tags=f.tags,
-                            dataset_filemetadata=f.dataset_filemetadata,
-                            status="ACTIVE",
-                        )
-                        session.add(new_file)
-                        existing_paths.add(new_path)
-                        added_count += 1
-                        added_size += int(f.file_size or 0)
-
-                    # Periodically flush to avoid huge transactions
-                    await session.flush()
+                added_count, added_size = await RatioTaskService.handle_ratio_relations(relations,session, target_ds)
 
                 # Update target dataset statistics
                 target_ds.file_count = (target_ds.file_count or 0) + added_count  # type: ignore
@@ -194,8 +121,8 @@ class RatioTaskService:
                     target_ds.status = "ACTIVE"
 
                 # Done
-                instance.status = "SUCCESS"
-                logger.info(f"Dataset ratio execution completed: instance={instance_id}, files={added_count}, size={added_size}")
+                instance.status = TaskStatus.COMPLETED.name
+                logger.info(f"Dataset ratio execution completed: instance={instance_id}, files={added_count}, size={added_size}, {instance.status}")
 
             except Exception as e:
                 logger.exception(f"Dataset ratio execution failed for {instance_id}: {e}")
@@ -204,42 +131,163 @@ class RatioTaskService:
                     inst_res = await session.execute(select(RatioInstance).where(RatioInstance.id == instance_id))
                     instance = inst_res.scalar_one_or_none()
                     if instance:
-                        instance.status = "FAILED"
+                        instance.status = TaskStatus.FAILED.name
                 finally:
                     pass
             finally:
                 await session.commit()
 
+    @staticmethod
+    async def handle_ratio_relations(relations: list[RatioRelation], session, target_ds: Dataset) -> tuple[int, int]:
+        # Preload existing target file paths for deduplication
+        existing_path_rows = await session.execute(
+            select(DatasetFiles.file_path).where(DatasetFiles.dataset_id == target_ds.id)
+        )
+        existing_paths = set(p for p in existing_path_rows.scalars().all() if p)
+
+        added_count = 0
+        added_size = 0
+
+        for rel in relations:
+            if not rel.source_dataset_id or not rel.counts or rel.counts <= 0:
+                continue
+
+            files = await RatioTaskService.get_files(rel, session)
+
+            if not files:
+                continue
+
+            pick_n = min(rel.counts or 0, len(files))
+            chosen = random.sample(files, pick_n) if pick_n < len(files) else files
+
+            # Copy into target dataset with de-dup by target path
+            for f in chosen:
+                await RatioTaskService.handle_selected_file(existing_paths, f, session, target_ds)
+                added_count += 1
+                added_size += int(f.file_size or 0)
+
+            # Periodically flush to avoid huge transactions
+            await session.flush()
+        return added_count, added_size
+
+    @staticmethod
+    async def handle_selected_file(existing_paths: set[Any], f, session, target_ds: Dataset):
+        src_path = f.file_path
+        dst_prefix = f"/dataset/{target_ds.id}"
+        file_name = RatioTaskService.get_new_file_name(dst_prefix, existing_paths, f)
+
+        new_path = dst_prefix + file_name
+        dst_dir = os.path.dirname(new_path)
+        await asyncio.to_thread(os.makedirs, dst_dir, exist_ok=True)
+        await asyncio.to_thread(shutil.copy2, src_path, new_path)
+
+        new_file = DatasetFiles(
+            dataset_id=target_ds.id,  # type: ignore
+            file_name=file_name,
+            file_path=new_path,
+            file_type=f.file_type,
+            file_size=f.file_size,
+            check_sum=f.check_sum,
+            tags=f.tags,
+            dataset_filemetadata=f.dataset_filemetadata,
+            status="ACTIVE",
+        )
+        session.add(new_file)
+        existing_paths.add(new_path)
+
+    @staticmethod
+    def get_new_file_name(dst_prefix: str, existing_paths: set[Any], f) -> str:
+        file_name = f.file_name
+        new_path = dst_prefix + file_name
+
+        # Handle file path conflicts by appending a number to the filename
+        if new_path in existing_paths:
+            file_name_base, file_ext = os.path.splitext(file_name)
+            counter = 1
+            original_file_name = file_name
+            while new_path in existing_paths:
+                file_name = f"{file_name_base}_{counter}{file_ext}"
+                new_path = f"{dst_prefix}{file_name}"
+                counter += 1
+                if counter > 1000:  # Safety check to prevent infinite loops
+                    logger.error(f"Could not find unique filename for {original_file_name} after 1000 attempts")
+                    break
+        return file_name
+
+    @staticmethod
+    async def get_files(rel: RatioRelation, session) -> list[Any]:
+        # Fetch all files for the source dataset (ACTIVE only)
+        files_res = await session.execute(
+            select(DatasetFiles).where(
+                DatasetFiles.dataset_id == rel.source_dataset_id,
+                DatasetFiles.status == "ACTIVE",
+            )
+        )
+        files = list(files_res.scalars().all())
+
+        # TAG mode: filter by tags according to relation.filter_conditions
+        conditions = RatioTaskService._parse_conditions(rel.filter_conditions)
+        if conditions:
+            files = [f for f in files if RatioTaskService._filter_file(f, conditions)]
+        return files
+
     # ------------------------- helpers for TAG filtering ------------------------- #
 
     @staticmethod
-    def _parse_required_tags(conditions: Optional[str]) -> set[str]:
-        """Parse filter_conditions into a set of required tag strings.
+    def _parse_conditions(conditions: Optional[str]) -> Optional[FilterCondition]:
+        """Parse filter_conditions JSON string into a FilterCondition object.
 
-        Supports simple separators: comma, semicolon, space. Empty/None -> empty set.
+        Args:
+            conditions: JSON string containing filter conditions
+
+        Returns:
+            FilterCondition object if conditions is not None/empty, otherwise None
         """
         if not conditions:
-            return set()
-        data = json.loads(conditions)
-        required_tags = set()
-        if data.get("label"):
-            required_tags.add(data["label"])
-        return required_tags
+            return None
+        try:
+            data = json.loads(conditions)
+            return FilterCondition(**data)
+        except json.JSONDecodeError as e:
+            logger.error(f"Failed to parse filter conditions: {e}")
+            return None
+        except Exception as e:
+            logger.error(f"Error creating FilterCondition: {e}")
+            return None
 
     @staticmethod
-    def _file_contains_tags(file: DatasetFiles, required: set[str]) -> bool:
-        if not required:
+    def _filter_file(file: DatasetFiles, conditions: FilterCondition) -> bool:
+        if not conditions:
             return True
-        tags = file.tags
-        if not tags:
-            return False
-        try:
-            # tags could be a list of strings or list of objects with 'name'
-            tag_names = RatioTaskService.get_all_tags(tags)
-            return required.issubset(tag_names)
-        except Exception as e:
-            logger.exception(f"Failed to get tags for {file}", e)
-            return False
+        logger.info(f"start filter file: {file}, conditions: {conditions}")
+
+        # Check data range condition if provided
+        if conditions.date_range:
+            try:
+                from datetime import datetime, timedelta
+                data_range_days = int(conditions.date_range)
+                if data_range_days > 0:
+                    cutoff_date = datetime.now() - timedelta(days=data_range_days)
+                    if file.tags_updated_at and file.tags_updated_at < cutoff_date:
+                        return False
+            except (ValueError, TypeError) as e:
+                logger.warning(f"Invalid data_range value: {conditions.date_range}", e)
+                return False
+
+        # Check label condition if provided
+        if conditions.label:
+            tags = file.tags
+            if not tags:
+                return False
+            try:
+                # tags could be a list of strings or list of objects with 'name'
+                tag_names = RatioTaskService.get_all_tags(tags)
+                return conditions.label in tag_names
+            except Exception as e:
+                logger.exception(f"Failed to get tags for {file}", e)
+                return False
+
+        return True
 
     @staticmethod
     def get_all_tags(tags) -> set[str]: