diff --git a/frontend/src/pages/DataManagement/Create/EditDataset.tsx b/frontend/src/pages/DataManagement/Create/EditDataset.tsx
index cabc524..717bdf0 100644
--- a/frontend/src/pages/DataManagement/Create/EditDataset.tsx
+++ b/frontend/src/pages/DataManagement/Create/EditDataset.tsx
@@ -58,6 +58,8 @@ export default function EditDataset({
     const params = {
       ...formValues,
       files: undefined,
+      // 将空字符串转换为 undefined，以便后端正确识别为清除关联数据集
+      parentDatasetId: formValues.parentDatasetId || undefined,
     };
     try {
       await updateDatasetByIdUsingPut(data?.id, params);