diff --git a/app/views/layouts/_logined_header.html.erb b/app/views/layouts/_logined_header.html.erb
index 7f6e08f9..30ef0658 100644
--- a/app/views/layouts/_logined_header.html.erb
+++ b/app/views/layouts/_logined_header.html.erb
@@ -18,7 +18,6 @@
           </ul>
         </li>
       <% end %>
-      <li class="<%= params[:controller] == "libraries" ? "active" : "" %>"><%= link_to '教学案例', libraries_path %></li>
       <li class="<%= params[:controller] == "competitions" ? " active" : "" %>"><%= link_to "竞赛", competitions_path %></li>
       <li class="<%= params[:controller] == "forums" ? " active" : "" %>"><%= link_to "问答", forums_path %></li>
       <% if User.current.ec_school.present? %>