diff --git a/backend/app/routers/health.py b/backend/app/routers/health.py
index c865291..683016f 100644
--- a/backend/app/routers/health.py
+++ b/backend/app/routers/health.py
@@ -1,7 +1,10 @@
 """健康检查路由"""
-from fastapi import APIRouter
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from sqlalchemy import text
 
 from ..config import get_settings
+from ..database import get_db
 
 router = APIRouter(tags=["health"])
 settings = get_settings()
@@ -15,3 +18,28 @@ async def health_check():
         "app": settings.APP_NAME,
         "version": settings.APP_VERSION
     }
+
+
+@router.post("/migrate/add-corp-id")
+async def migrate_add_corp_id(db: Session = Depends(get_db)):
+    """迁移：添加租户 corp_id 字段"""
+    try:
+        # 检查列是否存在
+        result = db.execute(text(
+            "SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS "
+            "WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'platform_tenants' AND COLUMN_NAME = 'corp_id'"
+        ))
+        exists = result.scalar()
+        
+        if exists:
+            return {"success": True, "message": "字段 corp_id 已存在，无需迁移"}
+        
+        # 添加列
+        db.execute(text(
+            "ALTER TABLE platform_tenants ADD COLUMN corp_id VARCHAR(100) AFTER name"
+        ))
+        db.commit()
+        
+        return {"success": True, "message": "字段 corp_id 添加成功"}
+    except Exception as e:
+        return {"success": False, "error": str(e)}
diff --git a/backend/app/routers/tenants.py b/backend/app/routers/tenants.py
index 48dcffc..4efbb7c 100644
--- a/backend/app/routers/tenants.py
+++ b/backend/app/routers/tenants.py
@@ -83,7 +83,7 @@ async def list_tenants(
                 "id": t.id,
                 "code": t.code,
                 "name": t.name,
-                "corp_id": t.corp_id,
+                "corp_id": getattr(t, 'corp_id', None),
                 "contact_info": t.contact_info,
                 "status": t.status,
                 "expired_at": t.expired_at,
@@ -123,7 +123,7 @@ async def get_tenant(
         "id": tenant.id,
         "code": tenant.code,
         "name": tenant.name,
-        "corp_id": tenant.corp_id,
+        "corp_id": getattr(tenant, 'corp_id', None),
         "contact_info": tenant.contact_info,
         "status": tenant.status,
         "expired_at": tenant.expired_at,