diff --git a/lib/tasks/exercise_publish.rake b/lib/tasks/exercise_publish.rake
index aacd67c1f..a27c6a6fb 100644
--- a/lib/tasks/exercise_publish.rake
+++ b/lib/tasks/exercise_publish.rake
@@ -6,6 +6,10 @@ namespace :exercise_publish do
     exercises = Exercise.where("publish_time is not null and exercise_status = 1 and publish_time <=?",Time.now)
     exercises.each do |exercise|
       exercise.update_column('exercise_status', 2)
+      course = exercise.course
+      course.members.each do |m|
+        exercise.course_messages << CourseMessage.new(:user_id => m.user_id, :course_id => course.id, :viewed => false, :status => 2)
+      end
     end
   end
 
diff --git a/lib/tasks/exercise_publishtime.rake b/lib/tasks/exercise_publishtime.rake
deleted file mode 100644
index 6cef511e2..000000000
--- a/lib/tasks/exercise_publishtime.rake
+++ /dev/null
@@ -1,22 +0,0 @@
-#coding=utf-8
-
-namespace :exercise_publishtime do
-  desc "start publish exercise"
-  task :publish => :environment do
-    exercises = Exercise.where("date_format(publish_time,'%Y-%m-%d')= '#{Date.today}'")
-    exercises.each do |exercise|
-      if exercise.exercise_status == 1 #未发布
-        exercise.update_column('exercise_status', 2) #改为发布
-        course = exercise.course
-        course.members.each do |m|
-          exercise.course_messages << CourseMessage.new(:user_id => m.user_id, :course_id => course.id, :viewed => false, :status => 2)
-        end
-        # if homework.course_acts.size == 0
-        #   homework.course_acts << CourseActivity.new(:user_id => homework.user_id,:course_id => homework.course_id)
-        # end
-        # 邮件通知
-        #Mailer.run.homework_added(homework)
-      end
-    end
-  end
-end
\ No newline at end of file