diff --git a/app/helpers/files_helper.rb b/app/helpers/files_helper.rb
index 9a0a1127f..4f3f401c9 100644
--- a/app/helpers/files_helper.rb
+++ b/app/helpers/files_helper.rb
@@ -44,10 +44,10 @@ module FilesHelper
     File.new(zipfile_name,'w+')
   end
 
-  def courses_check_box_tags(name,courses,current_course)
+  def courses_check_box_tags(name,courses,current_course,attachment)
     s = ''
     courses.each do |course|
-      if course.id != current_course.id && is_course_teacher(User.current,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/>"
       end
     end
diff --git a/app/views/files/_show_quote_resource.html.erb b/app/views/files/_show_quote_resource.html.erb
index 8041802a5..ef907f40f 100644
--- a/app/views/files/_show_quote_resource.html.erb
+++ b/app/views/files/_show_quote_resource.html.erb
@@ -8,7 +8,7 @@
                    remote: true,
                    id: "relation_file_form" do %>
           <%= hidden_field_tag(:file_id, file.id) %>
-          <%= content_tag('div', courses_check_box_tags('courses[course][]', User.current.courses,course), :id => 'courses')%>
+          <%= content_tag('div', courses_check_box_tags('courses[course][]', User.current.courses,course,file), :id => 'courses')%>
           <a id="submit_quote" href="javascript:void(0)" class="upload_btn" onclick="submit_quote();">引&nbsp;&nbsp;用</a><a href="javascript:void(0)" class="upload_btn upload_btn_grey" onclick="closeModal();">取&nbsp;&nbsp;消</a>
       <% end -%>
     </div>