diff --git a/app/common/service/SubjectHomeworkService.php b/app/common/service/SubjectHomeworkService.php
index 66eba8e..0569223 100644
--- a/app/common/service/SubjectHomeworkService.php
+++ b/app/common/service/SubjectHomeworkService.php
@@ -201,6 +201,8 @@ class SubjectHomeworkService
                 if($subject_homework->subject_report_version_url){
                     //翻译件不为空，取翻译件值
                     $subject_homework->subject_report_url = $subject_homework->subject_report_version_url;
+                }else{
+                    $subject_homework->subject_report_url = '';
                 }
             }