diff --git a/app/views/colleges/_course_statistics.html.erb b/app/views/colleges/_course_statistics.html.erb
index 087941c3..67e989f3 100644
--- a/app/views/colleges/_course_statistics.html.erb
+++ b/app/views/colleges/_course_statistics.html.erb
@@ -26,7 +26,7 @@
       <td class="edu-txt-center"><%= course.messages_count.to_i %></td>
       <td class="edu-txt-center"><%= course.hcm_nonshixun_count.to_i + course.exercises_count.to_i + course.polls_count.to_i %></td>
       <td class="edu-txt-center <%= course.is_end ? "color-grey-98" : "color-orange" %>"><%= course.is_end ? "已结束" : "正在进行" %></td>
-      <td class="edu-txt-center color-grey-9"><%= format_time @active_time[course.id] %></td>
+      <td class="edu-txt-center color-grey-9"><%= format_time course.update_time %></td>
     </tr>
   <% end %>
   </tbody>