diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index 31463d691..25bb31cbb 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 +347,18 @@ 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)
+        if @message && @message == ""
+          @message += l(:label_course_prompt) + c.name + l(:label_contain_resource) + file.filename + l(:label_quote_resource_failed)
+          next
+        else
+          @message +=  "<br/>" + l(:label_course_prompt) + c.name + l(:label_contain_resource) + file.filename + l(:label_quote_resource_failed)
+          next
+        end
+      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/controllers/files_controller.rb b/app/controllers/files_controller.rb
index 251496e30..aa1c158e0 100644
--- a/app/controllers/files_controller.rb
+++ b/app/controllers/files_controller.rb
@@ -28,6 +28,7 @@ class FilesController < ApplicationController
   include SortHelper
   include FilesHelper
   helper :project_score
+  include CoursesHelper
 
   def show_attachments obj
     @attachments = []
diff --git a/app/helpers/attachments_helper.rb b/app/helpers/attachments_helper.rb
index 3c882d393..52002b028 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.nil? && !attachment.copy_from.nil? && 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/helpers/courses_helper.rb b/app/helpers/courses_helper.rb
index 73e7daa26..d06bf7d38 100644
--- a/app/helpers/courses_helper.rb
+++ b/app/helpers/courses_helper.rb
@@ -486,6 +486,20 @@ module CoursesHelper
     term
   end
 
+  def course_in_current_or_next_term course
+    is_current_term = false
+    is_next_term = false
+    if course.time == Time.now.year && course.term == cur_course_term
+      is_current_term = true
+    end
+    if cur_course_term == "秋季学期" && course.time == (Time.now.year + 1) && course.term == "春季学期"
+      is_next_term = true
+    elsif cur_course_term == "春季学期" && course.time == Time.now.year && course.term == "秋季学期"
+      is_next_term = true
+    end
+    is_current_term || is_next_term
+  end
+
   #获取课程动态
   def get_course_activity courses, activities
     @course_ids=activities.keys()
diff --git a/app/helpers/files_helper.rb b/app/helpers/files_helper.rb
index 399b7be1d..c3a6a7b3e 100644
--- a/app/helpers/files_helper.rb
+++ b/app/helpers/files_helper.rb
@@ -47,18 +47,18 @@ module FilesHelper
   def courses_check_box_tags(name,courses,current_course,attachment)
     s = ''
     courses.each do |course|
-      if !(attachment.container_type && attachment.container_id == course.id)  && is_course_teacher(User.current,course)
-        s << "<label>#{ check_box_tag name, course.id, false, :id => nil } #{h course.name}</label><br/>"
+      if !(attachment.container_type && attachment.container_id == course.id)  && is_course_teacher(User.current,course) && course_in_current_or_next_term(course)
+        s << "<label>#{ check_box_tag name, course.id, false, :id => nil } #{h course.name}</label>&nbsp;[#{get_course_term course}]<br/>"
       end
     end
     s.html_safe
   end
 
-  #判断用户是否拥有课程，需用户在该课程中角色为教师
+  #判断用户是否拥有课程，需用户在该课程中角色为教师且该课程属于当前学期或下一学期
   def has_course? user
     result = false
     user.courses.each do |course|
-      if is_course_teacher(user,course)
+      if is_course_teacher(User.current,course) && course_in_current_or_next_term(course)
         return true
       end
     end
@@ -86,7 +86,7 @@ module FilesHelper
   def visable_attachemnts attachments
     result = []
     attachments.each do |attachment|
-      if attachment.is_public? || attachment.author_id == User.current.id
+      if attachment.is_public? || (attachment.container_type == "Course" && attachment.author.member_of_course?(Course.find(attachment.container_id)))|| attachment.author_id == User.current.id
         result << attachment
       end
     end
@@ -94,9 +94,15 @@ module FilesHelper
   end
 
   def get_qute_number attachment
-    if attachment.copy_from.nil?
-      return 0
+    if attachment.copy_from
+      result = Attachment.find_by_sql("select count(*) as number from attachments where copy_from = #{attachment.copy_from}")
+    else
+      result = Attachment.find_by_sql("select count(*) as number from attachments where copy_from = #{attachment.id}")
+    end
+    if result.nil? || result.count <= 0
+      return 0
+    else
+      return result[0].number
     end
-    count = Attachment.find_by_sql("select count(*) from attachments where copy_from = #{attachment.copy_from}")
   end
 end
\ No newline at end of file
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..eec1e255a 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.html_safe %>");
 <% else %>
   closeModal();
 <% end %>
diff --git a/app/views/files/_course_list.html.erb b/app/views/files/_course_list.html.erb
index 6e434ed14..93e39f73f 100644
--- a/app/views/files/_course_list.html.erb
+++ b/app/views/files/_course_list.html.erb
@@ -41,7 +41,7 @@
         <p class="f_l c_grey02 font">文件大小：<%= number_to_human_size(file.filesize) %></p>
         <%= link_to( l(:button_delete), attachment_path(file),
                      :data => {:confirm => l(:text_are_you_sure)}, :method => :delete,:class => "f_r re_de") if delete_allowed && file.container_id == @course.id && file.container_type == "Course"%>
-        <p class="f_r c_grey02" ><%= time_tag(file.created_on).html_safe %><%= l(:label_bids_published_ago) %>&nbsp;&nbsp;|&nbsp;&nbsp;下载<%= file.downloads %>&nbsp;&nbsp;<!--|&nbsp;&nbsp;引用<%#=get_qute_number file %>--> </p>
+        <p class="f_r c_grey02" ><%= time_tag(file.created_on).html_safe %><%= l(:label_bids_published_ago) %>&nbsp;&nbsp;|&nbsp;&nbsp;下载<%= file.downloads %>&nbsp;&nbsp;|&nbsp;&nbsp;引用<%= get_qute_number file %> </p>
       </div>
       <div class="cl"></div>
       <div class="tag_h">
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! "
+