diff --git a/sf_manufacturing/controllers/controllers.py b/sf_manufacturing/controllers/controllers.py
index e253f4b0..0be53879 100644
--- a/sf_manufacturing/controllers/controllers.py
+++ b/sf_manufacturing/controllers/controllers.py
@@ -153,14 +153,14 @@ class Manufacturing_Connect(http.Controller):
                 [('production_id', '=', production_id), ('routing_type', '=', routing_type)], limit=1)
             if not workorder:
                 res = {'Succeed': False, 'ErrorCode': 202, 'Error': '该工单不存在'}
-                return res
+                return json.JSONEncoder().encode(res)
             if workorder.state != 'ready':
                 res = {'Succeed': False, 'ErrorCode': 202, 'Error': '工单未就绪'}
-                return res
+                return json.JSONEncoder().encode(res)
             work_equipment_id = request.env['maintenance.equipment'].sudo().search(['name', '=', equipment_id], limit=1)
             if not work_equipment_id:
                 res = {'Succeed': False, 'ErrorCode': 202, 'Error': '没有找到该加工设备'}
-                return res
+                return json.JSONEncoder().encode(res)
             workorder.equipment_id = work_equipment_id
             workorder.button_start()
         except Exception as e:
@@ -190,7 +190,7 @@ class Manufacturing_Connect(http.Controller):
                 return json.JSONEncoder().encode(res)
             if workorder.state != 'progress':
                 res = {'Succeed': False, 'ErrorCode': 202, 'Error': '该工单未开始'}
-                return res
+                return json.JSONEncoder().encode(res)
             workorder.button_finish()
         except Exception as e:
             res = {'Succeed': False, 'ErrorCode': 202, 'Error': e}