diff --git a/app/services/update_homework_publish_setting_service.rb b/app/services/update_homework_publish_setting_service.rb
index 86e348daf..0f61bcd75 100644
--- a/app/services/update_homework_publish_setting_service.rb
+++ b/app/services/update_homework_publish_setting_service.rb
@@ -76,7 +76,7 @@ class UpdateHomeworkPublishSettingService < ApplicationService
       # 实训作业截止时间已过也可修改截止时间，其他作业暂不支持修改
       if (homework.homework_type == "practice" || homework.end_time > Time.now) && homework.unified_setting
         tip_exception("截止时间不能为空") if params[:end_time].blank?
-        tip_exception("截止时间必须晚于发布时间") if params[:end_time].to_time >= homework.publish_time
+        tip_exception("截止时间必须晚于发布时间") if params[:end_time].to_time <= homework.publish_time
         # tip_exception("截止时间不能早于当前时间") if params[:end_time].to_time <= Time.now
         tip_exception("截止时间不能晚于课堂结束时间（#{course.end_date.end_of_day.strftime("%Y-%m-%d %H:%M")}）") if
           course.end_date.present? && params[:end_time].to_time > course.end_date.end_of_day