diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index d53289937..e239f84f0 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -514,6 +514,9 @@ class ExercisesController < ApplicationController
             if exercise_group.present? && (exercise_group.first.publish_time < Time.now) && (exercise_publish_time != exercise_group.first.publish_time)
               error_count += 1
             end
+            if exercise_group.present? && (exercise_group.first.publish_time < Time.now && exercise_group.first.end_time > Time.now) && (exercise_end_time < Time.now)
+              error_count += 1
+            end
             if error_count == 0
               common_group = exercise_groups_ids & course_id #传入的班级与问卷已存在的班级的交集，即表示已有分班的
               new_group_ids = course_id - common_group  #新传入的班级id