diff --git a/app/controllers/homework_common_controller.rb b/app/controllers/homework_common_controller.rb
index 84f337d8..5b03010d 100644
--- a/app/controllers/homework_common_controller.rb
+++ b/app/controllers/homework_common_controller.rb
@@ -359,8 +359,8 @@ class HomeworkCommonController < ApplicationController
       # homework 的记录更新
       # 发布时间不为空
       if params_publish_time && min_publish_time != ""
-        @homework.publish_time = min_publish_time
-        @homework.end_time = max_end_time
+        @homework.publish_time = min_publish_time if @homework.publish_time.nil? || @homework.publish_time > Time.now
+        @homework.end_time = max_end_time if @homework.end_time.nil? || @homework.end_time > Time.now
         # @homework.archive_time = params_archive_time if params_archive_time
         if @homework.publish_time < Time.now and @homework_detail_manual.comment_status == 0
           @homework_detail_manual.comment_status = 1
@@ -379,10 +379,10 @@ class HomeworkCommonController < ApplicationController
 =end
         # 发布时间未设置  则按当前时间立即发布
       elsif params_publish_time && min_publish_time == ""
-        @homework_detail_manual.comment_status = 1
-        @homework.publish_time = Time.now
+        @homework_detail_manual.comment_status = 1 if @homework_detail_manual.comment_status == 0
+        @homework.publish_time = Time.now if @homework.publish_time.nil? || @homework.publish_time > Time.now
         @homework.unified_setting = 1
-        @homework.end_time = Time.at(((1.month.since.to_i)/3600.0).ceil * 3600)
+        @homework.end_time = Time.at(((1.month.since.to_i)/3600.0).ceil * 3600) if @homework.end_time.nil? || @homework.end_time > Time.now
         # @homework.archive_time = Time.at(((2.months.since.to_i)/3600.0).ceil * 3600)
 
         create_homework_user = 1
@@ -391,7 +391,7 @@ class HomeworkCommonController < ApplicationController
         end
         # 已发布的作业，只更新截止时间和结束时间
       else
-        @homework.end_time = max_end_time if params_end_time
+        @homework.end_time = max_end_time if params_end_time && (@homework.end_time.nil? || @homework.end_time > Time.now)
         # @homework.archive_time = params_archive_time if params_archive_time
 
 =begin