diff --git a/app/views/layouts/base_courses.html.erb b/app/views/layouts/base_courses.html.erb
index 138616fda..031bbda4a 100644
--- a/app/views/layouts/base_courses.html.erb
+++ b/app/views/layouts/base_courses.html.erb
@@ -176,7 +176,7 @@
               <% if student_score.score.to_i != 0 %>
                   <li> <a href="javascript:void:(0);"><%=link_to image_tag(url_to_avatar(student_score.user), :width => "35", :height => "35", :class=> "rankPortrait"),user_path(student_score.user) %></a>
                     <p><a href="javascript:void:(0);"><%=link_to student_score.user.show_name, user_path(student_score.user), :title => student_score.user.show_name %></a></p>
-                    <p><span class="c_red" style="cursor:pointer" title="作业总分：<%= student_score.score  %>"><%= student_score.score.to_i %></span></p>
+                    <p><span class="c_red" style="cursor:pointer" title="作业总分：<%= format("%.1f",student_score.score<0 ? 0 : student_score.score) %>"><%= student_score.score<0 ? 0 : student_score.score.to_i %></span></p>
                   </li>
               <% end %>
           <% end %>