diff --git a/app/controller/Task.php b/app/controller/Task.php
index 3bba496..da2fe55 100644
--- a/app/controller/Task.php
+++ b/app/controller/Task.php
@@ -590,7 +590,10 @@ class Task extends BaseController
     private function downloadName(JobsT $job_info){
         $job_params = json_decode($job_info->payload,true)['data']['params'];
         list(,$ext) = explode('.', $job_info->remark);
-        $downloadName = $job_params['export_date1'] . '-' . $job_params['export_date2'];
+        if (empty($job_params['export_date1']))
+            $downloadName = date('Y-m-d');
+        else
+            $downloadName = $job_params['export_date1'] . '-' . $job_params['export_date2'];
         if($job_info->queue != 'default'){
             $downloadName = $job_info->queue;
         }else if($job_params['export_type'] == 'repeat' && $job_params['export_table'] == 'repeat_frame_t'){