diff --git a/lib/tasks/homework_publishtime.rake b/lib/tasks/homework_publishtime.rake
index 4d79086d4..8e231fafd 100644
--- a/lib/tasks/homework_publishtime.rake
+++ b/lib/tasks/homework_publishtime.rake
@@ -1,7 +1,7 @@
 #coding=utf-8
 
 namespace :homework_publishtime do
-  desc "start publish homework"
+  desc "start publish homework and end homework"
   task :publish => :environment do
     homework_commons = HomeworkCommon.where("publish_time = '#{Date.today}'")
     homework_commons.each do |homework|
@@ -20,4 +20,16 @@ namespace :homework_publishtime do
       end
     end
   end
+
+  task :end => :environment do
+    homework_commons = HomeworkCommon.where("end_time < '#{Date.today}'")
+    homework_commons.each do |homework|
+      if homework.anonymous_comment == 1
+        homework_detail_manual = homework.homework_detail_manual
+        if homework_detail_manual.comment_status == 1
+          homework_detail_manual.update_column('comment_status', 3)
+        end
+      end
+    end
+  end
 end
\ No newline at end of file