diff --git a/app/Services/Admin/DeviceService.php b/app/Services/Admin/DeviceService.php
index 23c2495..aafb7b2 100644
--- a/app/Services/Admin/DeviceService.php
+++ b/app/Services/Admin/DeviceService.php
@@ -131,12 +131,12 @@ class DeviceService extends BaseService
                 $_fields = explode(',', $device->pivot->fields);
             }
             if($diffDays) {
-                $modelQuery = $dayliyReportQuery->whereBetween('reported_at', [$startTime, $endTime]);
+                $modelQuery = (clone $dayliyReportQuery)->whereBetween('reported_at', [$startTime, $endTime]);
             }else{
-                $modelQuery = $reportQuery->whereDate('reported_at', $day);
+                $modelQuery = (clone $reportQuery)->whereDate('reported_at', $day);
             }
             if($modelQuery){
-                $datalist = $modelQuery->where('device_id', $device->id)->get()->keyBy('reported_at')->toArray();
+                $datalist = (clone $modelQuery)->where('device_id', $device->id)->get()->keyBy('reported_at')->toArray();
             }
 
             //组装数据；