diff --git a/frontend/src/db/backend-api.ts b/frontend/src/db/backend-api.ts
index 8944353..94ac852 100644
--- a/frontend/src/db/backend-api.ts
+++ b/frontend/src/db/backend-api.ts
@@ -92,6 +92,7 @@ export interface TemplateField {
   name: string;
   field_type: string;
   required: boolean;
+  hint?: string;
 }
 
 // 表格填写结果
@@ -625,7 +626,10 @@ export const backendApi = {
    */
   async fillTemplate(
     templateId: string,
-    templateFields: TemplateField[]
+    templateFields: TemplateField[],
+    sourceDocIds?: string[],
+    sourceFilePaths?: string[],
+    userHint?: string
   ): Promise<FillResult> {
     const url = `${BACKEND_BASE_URL}/templates/fill`;
 
@@ -636,6 +640,9 @@ export const backendApi = {
         body: JSON.stringify({
           template_id: templateId,
           template_fields: templateFields,
+          source_doc_ids: sourceDocIds || [],
+          source_file_paths: sourceFilePaths || [],
+          user_hint: userHint || null,
         }),
       });
 
diff --git a/frontend/src/pages/TemplateFill.tsx b/frontend/src/pages/TemplateFill.tsx
index 8c330a9..f9a4a39 100644
--- a/frontend/src/pages/TemplateFill.tsx
+++ b/frontend/src/pages/TemplateFill.tsx
@@ -128,8 +128,12 @@ const TemplateFill: React.FC = () => {
     setStep('filling');
 
     try {
-      // 调用后端填表接口
-      const result = await backendApi.fillTemplate('temp-template-id', templateFields);
+      // 调用后端填表接口，传递选中的文档ID
+      const result = await backendApi.fillTemplate(
+        'temp-template-id',
+        templateFields,
+        selectedDocs  // 传递源文档ID列表
+      );
       setFilledResult(result);
       setStep('preview');
       toast.success('表格填写完成');