diff --git a/backend/server.js b/backend/server.js
index 36d5164..b86ecd4 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -96,18 +96,10 @@ async function syncBusinessModels() {
   const DeviceBusiness = require('./models/DeviceBusiness');
   const Warehouse = require('./models/Warehouse');
 
-  // 仅在开发环境使用 sync({ alter: true })，生产环境应使用 migrations
-  if (process.env.NODE_ENV !== 'production') {
-    await Business.sync({ alter: true });
-    await DeviceBusiness.sync({ alter: true });
-    await Warehouse.sync({ alter: true });
-    logger.info('业务/设备关联/库房模型同步完成（alter mode）');
-  } else {
-    await Business.sync();
-    await DeviceBusiness.sync();
-    await Warehouse.sync();
-    logger.info('业务/设备关联/库房模型同步完成（safe mode）');
-  }
+  await Business.sync();
+  await DeviceBusiness.sync();
+  await Warehouse.sync();
+  logger.info('业务/设备关联/库房模型同步完成');
 }
 
 async function initDefaultSystemSettings() {