diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index 31463d691..89a96a836 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -25,6 +25,7 @@ class AttachmentsController < ApplicationController
   #before_filter :login_without_softapplication, only: [:download]
   accept_api_auth :show, :download, :upload
   require 'iconv'
+  include AttachmentsHelper
 
 
   def show
@@ -346,8 +347,13 @@ class AttachmentsController < ApplicationController
   def add_exist_file_to_courses
     file = Attachment.find(params[:file_id])
     courses = params[:courses][:course]
+    @message = ""
     courses.each do |course|
       c = Course.find(course);
+      if course_contains_attachment?(c,file)
+        @message +=  l(:label_course_prompt) + c.name + l(:label_contain_resource) + file.filename + l(:label_quote_resource_failed)
+        next
+      end
       attach_copied_obj = file.copy
       attach_copied_obj.tag_list.add(file.tag_list) # tag关联
       attach_copied_obj.container = c
diff --git a/app/helpers/attachments_helper.rb b/app/helpers/attachments_helper.rb
index 3c882d393..f631f56ff 100644
--- a/app/helpers/attachments_helper.rb
+++ b/app/helpers/attachments_helper.rb
@@ -67,6 +67,15 @@ module AttachmentsHelper
     end
   end
 
+  def course_contains_attachment? course,attachment
+     course.attachments.each do |att|
+       if att.id == attachment.id || att.copy_from == attachment.copy_from || att.copy_from = attachment.id || att.id == attachment.copy_from
+         return true
+      end
+     end
+     false
+  end
+
   private
 
   def deletable? container, user=User.current
diff --git a/app/views/attachments/add_exist_file_to_courses.js.erb b/app/views/attachments/add_exist_file_to_courses.js.erb
index 23761647f..761111cec 100644
--- a/app/views/attachments/add_exist_file_to_courses.js.erb
+++ b/app/views/attachments/add_exist_file_to_courses.js.erb
@@ -1,5 +1,7 @@
-<% if !@save_flag%>
+<% if !@save_flag && @save_message %>
   $("#error_show").html("<%= @save_message.join(', ') %>");
+<% elsif @message || @message != "" %>
+ $("#error_show").html("<%= @message %>");
 <% else %>
   closeModal();
 <% end %>
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index 7d6cc85b2..0ec623217 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -2205,3 +2205,7 @@ zh:
   label_my_score: 我的评分
   field_open_anonymous_evaluation: 是否使用匿评
   label_course_empty_select: 尚未选择课程！
+  label_course_prompt: 课程：
+  label_contain_resource: 已包含资源：
+  label_quote_resource_failed: ",此资源引用失败! "
+