diff --git a/app/controllers/exercise_controller.rb b/app/controllers/exercise_controller.rb
index 2bc8612a4..89a5c195e 100644
--- a/app/controllers/exercise_controller.rb
+++ b/app/controllers/exercise_controller.rb
@@ -1,7 +1,7 @@
 class ExerciseController < ApplicationController
   layout "base_courses"
 
-  before_filter :find_exercise_and_course, :only => [:create_exercise_question, :edit, :update, :show]
+  before_filter :find_exercise_and_course, :only => [:create_exercise_question, :edit, :update, :show, :destroy]
   before_filter :find_course, :only => [:index,:new,:create,:student_exercise_list]
   include ExerciseHelper
 
@@ -102,7 +102,17 @@ class ExerciseController < ApplicationController
   end
 
   def destroy
-
+    if @exercise && @exercise.destroy
+      if @is_teacher
+        exercises = Exercise.where("course_id =?", @course.id)
+      else
+        exercises = Exercise.where("course_id =? and exercise_status =?", @course.id, 2)
+      end
+      @exercises = paginateHelper exercises,20 #分页
+      respond_to do |format|
+        format.js
+      end
+    end
   end
 
   # 统计结果
diff --git a/app/views/exercise/destroy.js.erb b/app/views/exercise/destroy.js.erb
new file mode 100644
index 000000000..c17b5a0f6
--- /dev/null
+++ b/app/views/exercise/destroy.js.erb
@@ -0,0 +1 @@
+$("#exercise").html("<%= escape_javascript(render :partial => 'exercises_list') %>");
\ No newline at end of file
diff --git a/app/views/exercise/index.html.erb b/app/views/exercise/index.html.erb
index 1a8d15181..bbe4dd707 100644
--- a/app/views/exercise/index.html.erb
+++ b/app/views/exercise/index.html.erb
@@ -1,4 +1,4 @@
 <%= stylesheet_link_tag  'polls', :media => 'all' %>
-<div class="polls_content02" id="polls">
+<div class="polls_content02" id="exercise">
   <%= render :partial => 'exercises_list'%>
 </div><!--问卷内容end-->
\ No newline at end of file