diff --git a/app/views/welcome/course.html.erb b/app/views/welcome/course.html.erb
index 9e29dc1ef..476471897 100644
--- a/app/views/welcome/course.html.erb
+++ b/app/views/welcome/course.html.erb
@@ -140,8 +140,9 @@
               <%break if Time.new.strftime("%Y").to_i - year_now >= 2%>
               <% all_new_hot_course += find_all_new_hot_course(course_count-all_new_hot_course.count, @school_id, year_now, course_term)%>
           <% end%>
-          <%= render :partial => 'course_list', :locals => {:course_list => all_new_hot_course} %>
-         
+          <% cache all_new_hot_course.max().created_at do %>
+             <%= render :partial => 'course_list', :locals => {:course_list => all_new_hot_course} %>
+          <% end %>
         </ul>
       </div>
   <% else %>
@@ -174,8 +175,9 @@
                   <%break if Time.new.strftime("%Y").to_i - year_now >= 2%>
                   <% all_new_hot_course += find_all_new_hot_course(9-(all_new_hot_course.count + cur_school_course.count), @school_id, year_now, course_term)%>
               <% end%>
-              <%= render :partial => 'course_list', :locals => {:course_list => all_new_hot_course} %>
-
+              <% cache all_new_hot_course.max().created_at do %>
+                <%= render :partial => 'course_list', :locals => {:course_list => all_new_hot_course} %>
+              <% end %>
           <% end %>
         </ul>
       </div>
@@ -192,10 +194,12 @@
 
   </h3>
   <span style="margin-top: -20px;float: right; display: block;"><%= link_to "更多>>", forums_path %></span>
-
+  <% topics = find_new_forum_topics(10) %>
+  <%# cache topics.maximum(:created_at) do%>
   <div class="d-p-projectlist-box">
     <ul class="d-p-projectlist">
-      <% find_new_forum_topics(10).each do |topic| %>
+
+         <% topics.each do |topic| %>
           <li class="message-brief-intro" style="min-height: 65px; line-height:2em; border-bottom: 1px dashed; padding-bottom: 3px">
             <div style="display: inline-block; width: 100%;">
 				  <span class="memo_activity text_nowrap" title="<%= topic.subject%>"
@@ -226,8 +230,10 @@
             </div>
           </li>
       <% end %>
+
     </ul>
   </div>
+  <%# end %>
 </div>
 <div class="clearfix"></div>