diff --git a/app/adminapi/controller/device/DeviceController.php b/app/adminapi/controller/device/DeviceController.php
index 9d1475d..fc30a86 100644
--- a/app/adminapi/controller/device/DeviceController.php
+++ b/app/adminapi/controller/device/DeviceController.php
@@ -134,7 +134,7 @@ class DeviceController extends BaseAdminController
             $iccid = $this->request->param('iccid', '');
             $deviceId = $this->request->param('deviceId', '');
             // 判断设备编码是否被使用
-            $device = Device::where('sn', $deviceId)->find();
+            $device = Device::where('code', $deviceId)->find();
             if ($device) {
                 return $this->fail('设备编码已被使用');
             }