diff --git a/web/pages/KnowledgeBase.tsx b/web/pages/KnowledgeBase.tsx
index 4814ef6..f5c09e9 100644
--- a/web/pages/KnowledgeBase.tsx
+++ b/web/pages/KnowledgeBase.tsx
@@ -1,8 +1,8 @@
 import React, { useEffect, useState, useRef } from 'react';
 import { Search, Plus, FileText, Upload, ArrowLeft, CloudUpload, File as FileIcon, X, Pencil, Trash2, Settings2, MoreHorizontal } from 'lucide-react';
 import { Button, Input, TableHeader, TableRow, TableHead, TableCell, Card, Dialog, Badge } from '../components/UI';
-import { KnowledgeBase } from '../types';
-import { createKnowledgeBase, deleteKnowledgeBase, deleteKnowledgeDocument, fetchKnowledgeBaseById, fetchKnowledgeBases, fetchLLMModels, searchKnowledgeBase, updateKnowledgeBase, uploadKnowledgeDocument, type KnowledgeSearchResultItem } from '../services/backendApi';
+import { KnowledgeBase, KnowledgeDocument } from '../types';
+import { createKnowledgeBase, deleteKnowledgeBase, deleteKnowledgeDocument, fetchKnowledgeBaseById, fetchKnowledgeBases, fetchLLMModels, indexKnowledgeDocument, searchKnowledgeBase, updateKnowledgeBase, uploadKnowledgeDocument, type KnowledgeSearchResultItem } from '../services/backendApi';
 
 const EMBEDDING_OPTIONS = [
   'text-embedding-3-small',
@@ -189,6 +189,15 @@ export const KnowledgeBasePage: React.FC = () => {
             onImport={() => setIsUploadOpen(true)}
             onEdit={() => openEditKb(selectedKb)}
             onDelete={() => handleDeleteKb(selectedKb)}
+            onIndexDocument={async (docId, content) => {
+              try {
+                await indexKnowledgeDocument(selectedKb.id, docId, content);
+                await refreshKnowledgeBases();
+              } catch (error: any) {
+                console.error(error);
+                throw new Error(error?.message || '索引失败。');
+              }
+            }}
             onDeleteDocument={async (docId) => {
               try {
                 await deleteKnowledgeDocument(selectedKb.id, docId);
@@ -452,9 +461,13 @@ const KnowledgeBaseDetail: React.FC<{
   onImport: () => void;
   onEdit: () => void;
   onDelete: () => void;
+  onIndexDocument: (docId: string, content: string) => Promise<void>;
   onDeleteDocument: (docId: string) => void;
-}> = ({ kb, onBack, onImport, onEdit, onDelete, onDeleteDocument }) => {
+}> = ({ kb, onBack, onImport, onEdit, onDelete, onIndexDocument, onDeleteDocument }) => {
   const [docSearch, setDocSearch] = useState('');
+  const [indexingDoc, setIndexingDoc] = useState<KnowledgeDocument | null>(null);
+  const [indexContent, setIndexContent] = useState('');
+  const [indexing, setIndexing] = useState(false);
   const [debugQuery, setDebugQuery] = useState('');
   const [debugTopK, setDebugTopK] = useState(5);
   const [debugLoading, setDebugLoading] = useState(false);
@@ -489,6 +502,26 @@ const KnowledgeBaseDetail: React.FC<{
     return `${(score * 100).toFixed(2)}%`;
   };
 
+  const handleStartIndex = async () => {
+    if (!indexingDoc) return;
+    const content = indexContent.trim();
+    if (!content) {
+      alert('请输入文档内容后再开始索引');
+      return;
+    }
+
+    try {
+      setIndexing(true);
+      await onIndexDocument(indexingDoc.id, content);
+      setIndexingDoc(null);
+      setIndexContent('');
+    } catch (error: any) {
+      alert(error?.message || '索引失败');
+    } finally {
+      setIndexing(false);
+    }
+  };
+
   return (
     <div className="space-y-6 animate-in slide-in-from-right-4">
       <div className="flex items-center justify-between">
@@ -546,6 +579,17 @@ const KnowledgeBaseDetail: React.FC<{
                 <TableCell className="text-muted-foreground">{doc.chunkCount ?? 0}</TableCell>
                 <TableCell className="text-muted-foreground">{doc.uploadDate}</TableCell>
                 <TableCell className="text-right">
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    className="text-primary hover:text-primary/80 mr-1"
+                    onClick={() => {
+                      setIndexingDoc(doc);
+                      setIndexContent('');
+                    }}
+                  >
+                    索引
+                  </Button>
                   <Button
                     variant="ghost"
                     size="sm"
@@ -629,6 +673,45 @@ const KnowledgeBaseDetail: React.FC<{
           )}
         </div>
       </Card>
+
+      <Dialog
+        isOpen={!!indexingDoc}
+        onClose={() => {
+          if (indexing) return;
+          setIndexingDoc(null);
+          setIndexContent('');
+        }}
+        title={`开始索引: ${indexingDoc?.name || ''}`}
+        footer={
+          <>
+            <Button
+              variant="ghost"
+              onClick={() => {
+                if (indexing) return;
+                setIndexingDoc(null);
+                setIndexContent('');
+              }}
+            >
+              取消
+            </Button>
+            <Button onClick={handleStartIndex} disabled={indexing}>
+              {indexing ? '索引中...' : '开始索引'}
+            </Button>
+          </>
+        }
+      >
+        <div className="space-y-3">
+          <p className="text-xs text-muted-foreground">
+            当前后端索引接口需要提交文本内容。请粘贴要写入向量库的文档全文或片段后执行。
+          </p>
+          <textarea
+            value={indexContent}
+            onChange={(e) => setIndexContent(e.target.value)}
+            className="flex min-h-[220px] w-full rounded-md border border-white/10 bg-white/5 px-3 py-2 text-sm shadow-sm placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-primary/50 text-white"
+            placeholder="粘贴文档内容用于索引..."
+          />
+        </div>
+      </Dialog>
     </div>
   );
 };
diff --git a/web/services/backendApi.ts b/web/services/backendApi.ts
index 40dab5f..99c4e7b 100644
--- a/web/services/backendApi.ts
+++ b/web/services/backendApi.ts
@@ -623,6 +623,23 @@ export const deleteKnowledgeDocument = async (kbId: string, docId: string): Prom
   await apiRequest(`/knowledge/bases/${kbId}/documents/${docId}`, { method: 'DELETE' });
 };
 
+export const indexKnowledgeDocument = async (
+  kbId: string,
+  docId: string,
+  content: string,
+): Promise<{ message: string; chunkCount: number }> => {
+  return apiRequest<{ message: string; chunkCount: number }>(
+    `/knowledge/bases/${kbId}/documents/${docId}/index`,
+    {
+      method: 'POST',
+      body: {
+        document_id: docId,
+        content,
+      },
+    }
+  );
+};
+
 export type KnowledgeSearchResultItem = {
   content: string;
   metadata?: {