--- a/application/p/logic/DateMenu.php
+++ b/application/p/logic/DateMenu.php
@@ -166,7 +166,7 @@
                     ->select();
         $date_menu_data = [];
         foreach ($date_menu as $v){
-            $date_menu_data[$v['menu_date']][$v['staff_uuid']][$v['meal_times']] = $v['create_time'];
+            $date_menu_data[$v['menu_date']][$v['staff_uuid']][$v['meal_times']] = $this->normalizeStaffDiningTime($v['create_time']);
         }
         if (!empty($dining_flag)){
             $dining_flag_array = explode(',',$dining_flag);
@@ -268,6 +268,19 @@
         $data['total'] = count($res);
         return array('code' => 0 , 'message' => '数据查询成功', 'data' => $data);
     }
+    /** Keep the selected GROUP BY row unchanged; normalize only TIMESTAMP(0) text. */
+    private function normalizeStaffDiningTime($value)
+    {
+        if (ltrim((string)\think\Config::get('database.type'), '\\') === \app\cores\database\Dm::class
+            && is_string($value)
+            && preg_match('/^((\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2}))\.0{1,6}$/D', $value, $match)
+            && (int)$match[2] >= 1000 && checkdate((int)$match[3], (int)$match[4], (int)$match[2])
+            && (int)$match[5] <= 23 && (int)$match[6] <= 59 && (int)$match[7] <= 59) {
+            return $match[1];
+        }
+        return $value;
+    }
+
     //就餐导出
     public function staffDiningExport($where, $orderBy,$user,$start_time,$end_time,$dining_flag,$lack_meals, $permissionStaffUuids = null){
         if (!empty($where['department_uuid'])) {