diff --git a/app/controllers/zipdown_controller.rb b/app/controllers/zipdown_controller.rb
index 10aa39df2..dac213ff5 100644
--- a/app/controllers/zipdown_controller.rb
+++ b/app/controllers/zipdown_controller.rb
@@ -76,13 +76,19 @@ class ZipdownController < ApplicationController
     # Todo: User Access Controll
 
     homeattaches = bid.homeworks
+    #记录所有作业是不是有附件，有一个附件就改为true
+    has_file = false
     # 得到每一个人所有文件打包的zip文件
     # 并将每一个人的zip打包为一个并返回路径
     user_zip_paths = homeattaches.map do |homeattach|
       if homeattach.attachments.count > 0
         zip_homework_by_user homeattach
+        has_file = true if has_file == false
       end
     end
+
+    render_403 :message => :no_file_dowmload ,:layout => "course_base" if has_file == false
+
     zipping "#{Time.now.to_i}_#{bid.name}.zip", user_zip_paths, OUTPUT_FOLDER
 
     #@paths = homeworks_attach_path