diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index e96d9eaaf..eae04490a 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -665,10 +665,14 @@ module ApplicationHelper
     Myshixun.where(:user_id => User.current.id, :shixun_id => shixun.id).count > 0 ? true : false
   end
 
-  # 用户必须登录；必须创建了关卡；必须提交了版本库代码
+  # 用户必须登录；必须创建了关卡；有实践任务的必须提交了版本库代码
   def allow_shixun_exec shixun
     g = Gitlab.client
-    (User.current.logged? && shixun.challenges.count > 0 && g.trees(shixun.gpid).count.to_i > 0)
+    result = User.current.logged? && shixun.challenges.count > 0
+    if shixun.challenges.where(:st => 0).count > 0
+      result = result && g.trees(shixun.gpid).count.to_i > 0
+    end
+    result
   end
 
   # 判断当前用户是否可以开始实战
diff --git a/app/views/subjects/show.html.erb b/app/views/subjects/show.html.erb
index 468809166..619724db4 100644
--- a/app/views/subjects/show.html.erb
+++ b/app/views/subjects/show.html.erb
@@ -33,7 +33,7 @@
             <% stage.stage_shixuns.each_with_index do |stage_shixun, index| %>
                 <% shixun = stage_shixun.shixun %>
                 <div class="clearfix pt10 pb10 ml20 pl10 mb10 paragraph" id="stage_shixun_<%= shixun.id %>"
-                     style="<%= shixun.status > 1 ? "" : "cursor: pointer" %>;" onclick="<%= shixun.status > 1 ? "" : "shixun_link('#{shixun.identifier}')" %>">
+                     style="<%= allow_shixun_exec(shixun) ? "" : "cursor: pointer" %>;" onclick="<%= allow_shixun_exec(shixun) ? "" : "shixun_link('#{shixun.identifier}')" %>">
                   <li class="fl li-width63">
                     <i class="fa fa-sort-up color-grey-c fl mt5 mr10 transform90 font-18"></i>
                     <span class="color-grey3 paragraph_name"><%= s_index + 1 %>-<%= index + 1 %>&nbsp;&nbsp;<%= shixun.name %></span>