diff --git a/app/controller/AdminStatistics.php b/app/controller/AdminStatistics.php
index 0af8a05..fab9cb7 100644
--- a/app/controller/AdminStatistics.php
+++ b/app/controller/AdminStatistics.php
@@ -105,9 +105,9 @@ class AdminStatistics extends BaseController
                                             ['create_time','<=',$datetime['end_time']],
                                         ])
                                         ->find();
-                    $data['histogram'] = [
+                    $data['histogram'][] = [
                         'date' => $month,
-                        'value' => $res['sum_num']
+                        'value' => $res['sum_num'] ?? 0
                     ];
                 }
             } else {
@@ -123,9 +123,9 @@ class AdminStatistics extends BaseController
                                                    ['create_time','<=',$datetime['end_time']],
                                                ])
                                                ->find();
-                    $data['histogram'] = [
+                    $data['histogram'][] = [
                         'date' => $month,
-                        'value' => $res['sum_num']
+                        'value' => $res['sum_num'] ?? 0
                     ];
                 }
             }