diff --git a/frontend/src/pages/DataAnnotation/Home/DataAnnotation.tsx b/frontend/src/pages/DataAnnotation/Home/DataAnnotation.tsx
index 373ebc7..3aaa394 100644
--- a/frontend/src/pages/DataAnnotation/Home/DataAnnotation.tsx
+++ b/frontend/src/pages/DataAnnotation/Home/DataAnnotation.tsx
@@ -4,7 +4,6 @@ import {
   PlusOutlined,
   EditOutlined,
   DeleteOutlined,
-  SyncOutlined,
   DownloadOutlined,
 } from "@ant-design/icons";
 import { useNavigate } from "react-router";
@@ -15,7 +14,6 @@ import useFetchData from "@/hooks/useFetchData";
 import {
   deleteAnnotationTaskByIdUsingDelete,
   queryAnnotationTasksUsingGet,
-  syncAnnotationTaskUsingPost,
   queryAutoAnnotationTasksUsingGet,
   deleteAutoAnnotationTaskByIdUsingDelete,
 } from "../annotation.api";
@@ -106,12 +104,7 @@ export default function DataAnnotation() {
   const handleDelete = (task: AnnotationTask) => {
     Modal.confirm({
       title: `确认删除标注任务「${task.name}」吗？`,
-      content: (
-        <div>
-          <div>删除标注任务不会删除对应数据集。</div>
-          <div>如需保留当前标注结果，请在同步后再删除。</div>
-        </div>
-      ),
+      content: "删除标注任务不会删除对应数据集，但会删除该任务的所有标注结果。",
       okText: "删除",
       okType: "danger",
       cancelText: "取消",
@@ -155,80 +148,13 @@ export default function DataAnnotation() {
     });
   };
 
-  const handleSync = (task: AnnotationTask, batchSize: number = 50) => {
-    Modal.confirm({
-      title: `确认同步标注任务「${task.name}」吗？`,
-      content: (
-        <div>
-          <div>标注工程中文件列表将与数据集保持一致，差异项将会被修正。</div>
-          <div>标注工程中的标签与数据集中标签将进行合并，冲突项将以最新一次内容为准。</div>
-        </div>
-      ),
-      okText: "同步",
-      cancelText: "取消",
-      onOk: async () => {
-        try {
-          await syncAnnotationTaskUsingPost({ id: task.id, batchSize });
-          message.success("任务同步请求已发送");
-          // optional: refresh list/status
-          fetchData();
-          // clear selection for the task
-          setSelectedRowKeys((keys) => keys.filter((k) => k !== task.id));
-          setSelectedRows((rows) => rows.filter((r) => r.id !== task.id));
-        } catch (e) {
-          console.error(e);
-          message.error("同步失败，请稍后重试");
-        }
-      },
-    });
-  };
-
-  const handleBatchSync = (batchSize: number = 50) => {
-    if (!selectedRows || selectedRows.length === 0) return;
-    const manualRows = selectedRows.filter((r) => r._kind !== "auto");
-    if (manualRows.length === 0) {
-      message.warning("请选择手动标注任务进行同步");
-      return;
-    }
-    Modal.confirm({
-      title: `确认同步所选 ${manualRows.length} 个标注任务吗？`,
-      content: (
-        <div>
-          <div>标注工程中文件列表将与数据集保持一致，差异项将会被修正。</div>
-          <div>标注工程中的标签与数据集中标签将进行合并，冲突项将以最新一次内容为准。</div>
-        </div>
-      ),
-      okText: "同步",
-      cancelText: "取消",
-      onOk: async () => {
-        try {
-          await Promise.all(
-            manualRows.map((r) => syncAnnotationTaskUsingPost({ id: r.id, batchSize }))
-          );
-          message.success("批量同步请求已发送");
-          fetchData();
-          setSelectedRowKeys([]);
-          setSelectedRows([]);
-        } catch (e) {
-          console.error(e);
-          message.error("批量同步失败，请稍后重试");
-        }
-      },
-    });
-  };
-
   const handleBatchDelete = () => {
     if (!selectedRows || selectedRows.length === 0) return;
     const manualRows = selectedRows.filter((r) => r._kind !== "auto");
     const autoRows = selectedRows.filter((r) => r._kind === "auto");
     Modal.confirm({
       title: `确认删除所选 ${selectedRows.length} 个标注任务吗？`,
-      content: (
-        <div>
-          <div>删除标注任务不会删除对应数据集。</div>
-          <div>如需保留当前标注结果，请在同步后再删除。</div>
-        </div>
-      ),
+      content: "删除标注任务不会删除对应数据集，但会删除这些任务的所有标注结果。",
       okText: "删除",
       okType: "danger",
       cancelText: "取消",
@@ -270,12 +196,6 @@ export default function DataAnnotation() {
       icon: <DownloadOutlined className="w-4 h-4" style={{ color: "#1890ff" }} />,
       onClick: handleExport,
     },
-    {
-      key: "sync",
-      label: "同步",
-      icon: <SyncOutlined className="w-4 h-4" style={{ color: "#722ed1" }} />,
-      onClick: handleSync,
-    },
     {
       key: "delete",
       label: "删除",
@@ -501,12 +421,6 @@ export default function DataAnnotation() {
 
                   {/* Right side: All action buttons */}
                   <div className="flex items-center gap-2">
-                    <Button
-                      onClick={() => handleBatchSync(50)}
-                      disabled={selectedRowKeys.length === 0}
-                    >
-                      批量同步
-                    </Button>
                     <Button
                       danger
                       onClick={handleBatchDelete}