diff --git a/app/controllers/student_works_controller.rb b/app/controllers/student_works_controller.rb
index 637155a1a..680c067f7 100644
--- a/app/controllers/student_works_controller.rb
+++ b/app/controllers/student_works_controller.rb
@@ -530,7 +530,7 @@ class StudentWorksController < ApplicationController
     @myself_eff = @echart_data[:efficiency_list].find { |item| item.last == @user.id }
     @myself_consume = @echart_data[:consume_list].find { |item| item.last == @user.id }
     filename_ = "#{@use&.student_id}_#{@use&.real_name}_#{@shixun&.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
-    filename = Base64.urlsafe_encode64(filename_.strip)
+    filename = filename_.strip.tr("+/", "-_")
     stylesheets = %w(shixun_work/shixun_work.css shared/codemirror.css)
     if params[:export].present? && params[:export]
       normal_status(0,"正在下载中")