diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index d49dac853..9780b4eec 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -107,7 +107,9 @@ class HomeworkCommonsController < ApplicationController
     student_works = @homework.all_works
     @all_member_count = student_works.size
 
-    if @homework.publish_time.nil? || (@homework.publish_time > Time.now)
+    logger.info("###########______@homework.publish_time_________#{@homework.publish_time}")
+
+    if @homework.publish_time.present? || (@homework.publish_time > Time.now)
       @student_works = []
       if (params[:format] == "xlsx") || (params[:format] == "zip")
         normal_status(-1,"作业未发布")