diff --git a/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/application/KnowledgeBaseService.java b/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/application/KnowledgeBaseService.java
index 65efb910..0c10cfd5 100644
--- a/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/application/KnowledgeBaseService.java
+++ b/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/application/KnowledgeBaseService.java
@@ -108,7 +108,8 @@ public PagedResponse<RagFile> listFiles(String knowledgeBaseId, RagFileReq reque
         return PagedResponse.of(page.getRecords(), page.getCurrent(), page.getTotal(), page.getPages());
     }
 
-    public void deleteFile(String knowledgeBaseId, DeleteFilesReq request) {
+    public void deleteFiles(String knowledgeBaseId, DeleteFilesReq request) {
+        ragFileRepository.removeByIds(request.getIds());
     }
 
     public PagedResponse<RagChunk> getChunks(String knowledgeBaseId, String ragFileId, PagingQuery pagingQuery) {
diff --git a/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/KnowledgeBaseController.java b/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/KnowledgeBaseController.java
index b0450e03..98bbe4ab 100644
--- a/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/KnowledgeBaseController.java
+++ b/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/KnowledgeBaseController.java
@@ -113,7 +113,7 @@ public PagedResponse<RagFile> listFiles(@PathVariable("knowledgeBaseId") String
     @DeleteMapping("/{knowledgeBaseId}/files")
     public void deleteFile(@PathVariable("knowledgeBaseId") String knowledgeBaseId,
                            @RequestBody DeleteFilesReq request) {
-        knowledgeBaseService.deleteFile(knowledgeBaseId, request);
+        knowledgeBaseService.deleteFiles(knowledgeBaseId, request);
     }
 
     /**
diff --git a/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/dto/DeleteFilesReq.java b/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/dto/DeleteFilesReq.java
index 0837d4e5..8b577045 100644
--- a/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/dto/DeleteFilesReq.java
+++ b/backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/dto/DeleteFilesReq.java
@@ -1,5 +1,8 @@
 package com.datamate.rag.indexer.interfaces.dto;
 
+import lombok.Getter;
+import lombok.Setter;
+
 import java.util.List;
 
 /**
@@ -8,6 +11,11 @@
  * @author dallas
  * @since 2025-10-29
  */
+@Setter
+@Getter
 public class DeleteFilesReq {
-    private List<String> fileIds;
+    /**
+     * Rag文件表主键ID列表
+     */
+    private List<String> ids;
 }
diff --git a/frontend/src/pages/KnowledgeBase/Detail/KnowledgeBaseDetail.tsx b/frontend/src/pages/KnowledgeBase/Detail/KnowledgeBaseDetail.tsx
index a194903b..605cfd6c 100644
--- a/frontend/src/pages/KnowledgeBase/Detail/KnowledgeBaseDetail.tsx
+++ b/frontend/src/pages/KnowledgeBase/Detail/KnowledgeBaseDetail.tsx
@@ -55,7 +55,9 @@ const KnowledgeBaseDetailPage: React.FC = () => {
   // File table logic
   const handleDeleteFile = async (file: KBFile) => {
     try {
-      await deleteKnowledgeBaseFileByIdUsingDelete(knowledgeBase.id, file.id);
+      await deleteKnowledgeBaseFileByIdUsingDelete(knowledgeBase.id, {
+        ids: [file.id]
+      });
       message.success("文件已删除");
       fetchFiles();
     } catch (error) {
diff --git a/frontend/src/pages/KnowledgeBase/knowledge-base.api.ts b/frontend/src/pages/KnowledgeBase/knowledge-base.api.ts
index c69a37ab..f109bb8f 100644
--- a/frontend/src/pages/KnowledgeBase/knowledge-base.api.ts
+++ b/frontend/src/pages/KnowledgeBase/knowledge-base.api.ts
@@ -46,9 +46,6 @@ export function queryKnowledgeBaseFilesByIdUsingGet(
 }
 
 // 删除知识生成文件
-export function deleteKnowledgeBaseFileByIdUsingDelete(
-  baseId: string,
-  fileId: string
-) {
-  return del(`/api/knowledge-base/${baseId}/files/${fileId}`);
+export function deleteKnowledgeBaseFileByIdUsingDelete(baseId: string, data: any) {
+  return del(`/api/knowledge-base/${baseId}/files`, data);
 }
diff --git a/frontend/src/pages/KnowledgeBase/knowledge-base.model.ts b/frontend/src/pages/KnowledgeBase/knowledge-base.model.ts
index 8c9bf291..76fef588 100644
--- a/frontend/src/pages/KnowledgeBase/knowledge-base.model.ts
+++ b/frontend/src/pages/KnowledgeBase/knowledge-base.model.ts
@@ -11,7 +11,7 @@ export enum KBType {
 }
 
 export interface KnowledgeBaseItem {
-  id: number;
+  id: string;
   name: string;
   description: string;
   type: KBType;
@@ -22,7 +22,7 @@ export interface KnowledgeBaseItem {
 }
 
 export interface KBFile {
-  id: number;
+  id: string;
   fileName: string;
   name?: string;
   createdAt: string;
diff --git a/frontend/src/utils/request.ts b/frontend/src/utils/request.ts
index 4da996ea..9470a05f 100644
--- a/frontend/src/utils/request.ts
+++ b/frontend/src/utils/request.ts
@@ -366,6 +366,7 @@ class Request {
       },
       credentials: "include",
       mode: "cors",
+      body: params ? JSON.stringify(params) : undefined,
       ...options,
     };