diff --git a/app/services/export_shixun_report_service.rb b/app/services/export_shixun_report_service.rb
index 4263ef4f1..b75f031c0 100644
--- a/app/services/export_shixun_report_service.rb
+++ b/app/services/export_shixun_report_service.rb
@@ -10,7 +10,7 @@ class ExportShixunReportService
   end
 
   def filename
-    @_filename ||= "#{work.user&.student_id}_#{work.user.real_name}_#{homework.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}.pdf".gsub(' ', '-').gsub('/', '_')
+    @_filename ||= "#{homework.course&.user_group_name(work.user_id)}_#{work.user&.student_id}_#{work.user.real_name}_#{homework.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}.pdf".gsub(' ', '-').gsub('/', '_')
   end
 
   def prepare_binding