diff --git a/src/api/knowledge.ts b/src/api/knowledge.ts
index 8d03260..d92cf8a 100644
--- a/src/api/knowledge.ts
+++ b/src/api/knowledge.ts
@@ -13,4 +13,5 @@ export const knowledgeAPI = {
   sourceReferences(sourceId: string) { return api.get<SourceReference[]>(`/admin-api/knowledge-bases/sources/${sourceId}/references`) },
   allSources(params: string) { return api.get<PaginatedResult<KnowledgeSource>>(`/admin-api/knowledge-bases/all-sources?${params}`) },
   search(params: string) { return api.get<PaginatedResult<KnowledgeBase>>(`/admin-api/knowledge-bases?${params}`) },
+  verifyFiles() { return api.get<{ total: number; missing: number; missingFiles: { sourceId: string; filename: string; objectKey: string; exists: boolean }[] }>('/admin-api/knowledge-bases/verify-files') },
 }
diff --git a/src/pages/KnowledgeSources.tsx b/src/pages/KnowledgeSources.tsx
index e6f088b..004c0ca 100644
--- a/src/pages/KnowledgeSources.tsx
+++ b/src/pages/KnowledgeSources.tsx
@@ -1,5 +1,5 @@
 import { useState } from 'react'
-import { Table, Tag, Space, Input, Select, Typography } from 'antd'
+import { Table, Tag, Space, Input, Select, Typography, Tooltip } from 'antd'
 import { SearchOutlined } from '@ant-design/icons'
 import { useQuery } from '@tanstack/react-query'
 import { knowledgeAPI } from '@/api'
@@ -71,9 +71,27 @@ export default function KnowledgeSourcesPage() {
     staleTime: 60_000,
   })
 
+  const { data: fileCheck } = useQuery({
+    queryKey: ['admin', 'verify-files'],
+    queryFn: () => knowledgeAPI.verifyFiles(),
+    staleTime: 30_000,
+    refetchOnMount: true,
+  })
+
+  const missingMap = new Set((fileCheck?.missingFiles || []).map(f => f.sourceId))
+
   const columns = [
     { title: '文件名', dataIndex: 'originalFilename', width: 220, ellipsis: true, render: (v: string, r: KnowledgeSourceItem) => v || r.title || '-' },
     { title: '知识库', dataIndex: 'kbName', width: 140, ellipsis: true, render: (v: string, r: KnowledgeSourceItem) => v || r.knowledgeBaseId },
+    {
+      title: '文件', dataIndex: 'id', width: 60,
+      render: (id: string) => {
+        if (!fileCheck) return null
+        return missingMap.has(id)
+          ? <Tooltip title="文件丢失，需重新上传"><Tag color="red">❌</Tag></Tooltip>
+          : <Tag color="green">✅</Tag>
+      },
+    },
     { title: '类型', dataIndex: 'mimeType', width: 80, render: (v: string) => mimeLabels[v] || v?.split('/').pop() || '-' },
     { title: '大小', dataIndex: 'sizeBytes', width: 80, render: (v: number) => v ? `${(v / 1024).toFixed(1)} KB` : '-' },
     { title: '字数', dataIndex: 'textLength', width: 70, render: (v: number | undefined) => v != null ? v : '-' },