diff --git a/src/api/routes.py b/src/api/routes.py
index ca6ba54..b94026e 100644
--- a/src/api/routes.py
+++ b/src/api/routes.py
@@ -674,7 +674,7 @@ async def process_file_core(
             )
             
             # 保存质量指标和分析摘要到数据库
-            await self._save_analysis_metrics(db_session, stp_file_id, analysis_result)
+            await _save_analysis_metrics(db_session, stp_file_id, analysis_result)
 
         # 10. 完成处理
         await storage_service.update_stp_file_status(db_session, stp_file_id, "completed")