diff --git a/app/api/controller/DataCollectController.php b/app/api/controller/DataCollectController.php
index 556a6937..3c84ebdc 100644
--- a/app/api/controller/DataCollectController.php
+++ b/app/api/controller/DataCollectController.php
@@ -26,8 +26,6 @@ class DataCollectController extends BaseApiController
             if(!$parmas || !isset($parmas['username']) || $parmas['username']==''){
                 return $this->fail('参数错误');
             }
-            $payload= json_decode($parmas['payload'], true);
-
             $user = User::where('account', $parmas['username'])->find();
 
             $device = explode('_', $parmas['topic']); // 命名规则：camera_deviceid  deviceid为设备主键id
@@ -39,7 +37,7 @@ class DataCollectController extends BaseApiController
 
             // mqtt服务端 消息发布事件
             if ($parmas['event'] == 'message.publish') {
-
+                $payload= json_decode($parmas['payload'], true);
                 $data = [
                     'user_id' => $user['id'],
                     'land_id' => $landId,