diff --git a/app/controller/AdminStatistics.php b/app/controller/AdminStatistics.php
index 555355c..0af8a05 100644
--- a/app/controller/AdminStatistics.php
+++ b/app/controller/AdminStatistics.php
@@ -87,8 +87,6 @@ class AdminStatistics extends BaseController
 
             $type = $param['type'];
 
-            $start_time = date("Y-m-d H:i:s",strtotime('-4 month'));
-
             $date = get_near_month_datetime();
 
             $data = [];