diff --git a/app/views/files/_course_list.html.erb b/app/views/files/_course_list.html.erb
index fced58604..023cb23d2 100644
--- a/app/views/files/_course_list.html.erb
+++ b/app/views/files/_course_list.html.erb
@@ -21,13 +21,17 @@
     <div class="re_con_box">
       <div class=" ">
         <%= link_to_attachment file, :download => true, :title => file.filename+"\n"+file.description.to_s, :style => "overflow: hidden; white-space: nowrap;text-overflow: ellipsis;",:class => "c_dblue f_14 f_b f_l" %>
-        <% if is_course_teacher(User.current,@course) && User.current.id == file.author_id %>
+        <% if is_course_teacher(User.current,@course) %>
             <%= link_to "选入我的课程",quote_resource_show_course_file_path(@course,file),:class => "f_l re_select",:remote => true %>
-            <span id="is_public_<%= file.id %>">
-              <%= link_to (file.is_public? ? "公开":"私有"), update_file_dense_attachments_path(:attachmentid=>file.id,:newtype=>(file.is_public? ? 0:1)),:remote=>true,:class=>"f_l re_open",:method => :post  %>
-            </span>
+            <% if delete_allowed && file.container_id == @course.id && file.container_type == "Course"  %>
+              <span id="is_public_<%= file.id %>">
+                <%= link_to (file.is_public? ? "公开":"私有"), update_file_dense_attachments_path(:attachmentid=>file.id,:newtype=>(file.is_public? ? 0:1)),:remote=>true,:class=>"f_l re_open",:method => :post  %>
+              </span>
+            <% else %>
+                <%= link_to (file.is_public? ? "公开":"私有"),"javascript:void(0)",:class=>"f_l re_open" %>
+            <% end %>
+
         <% else %>
-            <%= link_to "选入我的课程",quote_resource_show_course_file_path(@course,file),:class => "f_l re_select",:remote => true %>
             <%= link_to (file.is_public? ? "公开":"私有"),"javascript:void(0)",:class=>"f_l re_open" %>
         <% end %>
       </div>