diff --git a/app/controllers/homework_common_controller.rb b/app/controllers/homework_common_controller.rb
index 5e290d678..b8c6a4a0a 100644
--- a/app/controllers/homework_common_controller.rb
+++ b/app/controllers/homework_common_controller.rb
@@ -85,6 +85,14 @@ class HomeworkCommonController < ApplicationController
       homework_detail_manual = @homework.homework_detail_manual || HomeworkDetailManual.new
       @homework.end_time = params[:homework_common][:end_time] || Time.now
       @homework.course_id = params[:course_id]
+      if params[:homework_type] && params[:homework_type].to_i != @homework.homework_type
+        if @homework.homework_type == 2
+          @homework.homework_detail_programing.destroy if @homework.homework_detail_programing
+          @homework.homework_tests.destroy_all
+        elsif @homework.homework_type == 3
+          @homework.homework_detail_group.destroy if @homework.homework_detail_group
+        end
+      end
       @homework.homework_type = params[:homework_type].to_i || @homework.homework_type
       anonymous = params[:homework_common][:anonymous_comment] ? params[:homework_common][:anonymous_comment].to_i : 1
       if anonymous != @homework.anonymous_comment
diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index a6dec8161..e8c061b5c 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -571,7 +571,7 @@ class StudentWorkController < ApplicationController
       @student_work = StudentWork.new
     #end
     respond_to do |format|
-      format.html{ render :layout => "new_base_user"}
+      format.html{ render :layout => "base_courses"}
     end
   end
 
@@ -657,7 +657,7 @@ class StudentWorkController < ApplicationController
       render_403
     else
       respond_to do |format|
-        format.html{ render :layout => "new_base_user"}
+        format.html{ render :layout => "base_courses"}
       end
     end
   end
diff --git a/app/views/student_work/edit.html.erb b/app/views/student_work/edit.html.erb
index 931cdc1de..657bdf486 100644
--- a/app/views/student_work/edit.html.erb
+++ b/app/views/student_work/edit.html.erb
@@ -2,6 +2,7 @@
     <%= import_ke(enable_at: true, prettify: false, init_activity: false) %>
     <%= javascript_include_tag 'homework','baiduTemplate' %>
 <% end %>
+<div class="homepageRight mt0 ml10">
 <div class="homepageRightBanner mb10">
   <div class="NewsBannerName">编辑作品</div>
 </div>
@@ -83,6 +84,7 @@
     <% end%>
   </div><!----HomeWorkCon end-->
 </div>
+</div>
 <script type="text/javascript">
     <% if @homework.homework_detail_group %>
     $(function(){
diff --git a/app/views/student_work/new.html.erb b/app/views/student_work/new.html.erb
index ec028c743..4a6b3608c 100644
--- a/app/views/student_work/new.html.erb
+++ b/app/views/student_work/new.html.erb
@@ -197,7 +197,8 @@
   });
 </script>
 
-<div class="homepageRightBanner mb10">
+<div class="homepageRight mt0 ml10">
+<div class="homepageRightBanner mb10 ml10">
   <div class="NewsBannerName">提交作品</div>
 </div>
 <div class="cl"></div>
@@ -297,4 +298,5 @@
         <div class="cl"></div>
     <% end%>
   </div><!----HomeWorkCon end-->
-</div>
\ No newline at end of file
+</div>
+</div>