diff --git a/app/views/files/_course_list.html.erb b/app/views/files/_course_list.html.erb
index 023cb23d2..fa22c404d 100644
--- a/app/views/files/_course_list.html.erb
+++ b/app/views/files/_course_list.html.erb
@@ -20,7 +20,7 @@
     <%end%>
     <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" %>
+        <%= link_to_attachment file, :download => true,:text => truncate(file.filename,length: 35, omission: '...'), :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) %>
             <%= link_to "选入我的课程",quote_resource_show_course_file_path(@course,file),:class => "f_l re_select",:remote => true %>
             <% if delete_allowed && file.container_id == @course.id && file.container_type == "Course"  %>