diff --git a/app/api/upload.py b/app/api/upload.py
index 1baba46..5dbb7b2 100644
--- a/app/api/upload.py
+++ b/app/api/upload.py
@@ -10,18 +10,26 @@ ALLOWED_SUFFIXES = {".txt", ".md", ".pdf", ".docx"}
 def upload_user_file(user_id: str = Form(...), file: UploadFile = File(...)):
     filename = os.path.basename(file.filename)
     suffix = os.path.splitext(filename)[-1].lower()
+    
     if suffix not in ALLOWED_SUFFIXES:
         raise HTTPException(status_code=400, detail="不支持的文件类型")
 
+    # 创建用户文档目录
     user_doc_dir = os.path.join("docs", user_id)
     os.makedirs(user_doc_dir, exist_ok=True)
 
+    # 创建索引存储路径，确保目录存在
+    index_data_dir = os.path.join("index_data", user_id)
+    os.makedirs(index_data_dir, exist_ok=True)
+
+    # 保存文件
     file_path = os.path.join(user_doc_dir, filename)
     try:
         with open(file_path, "wb") as f:
             shutil.copyfileobj(file.file, f)
         print(f"[UPLOAD] 文件已保存至 {file_path}")
 
+        # 创建索引
         build_user_index(user_id)
         print(f"[UPLOAD] 用户 {user_id} 的索引已重建")