diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index 96a73b08b..db8c688ad 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -909,7 +909,7 @@ class HomeworkCommonsController < ApplicationController
 
   def publish_homework
     tip_exception("请至少选择一个分班") if params[:group_ids].blank? && @course.course_groups.size != 0
-    group_ids = params[:group_ids]&.reject(&:blank?)
+    group_ids = params[:group_ids]&.reject(&:blank?).map(&:to_i)
     if params[:detail].blank?
       tip_exception("缺少截止时间参数") if params[:end_time].blank?
       tip_exception("截止时间不能早于当前时间") if params[:end_time] <= strf_time(Time.now)
@@ -1048,7 +1048,8 @@ class HomeworkCommonsController < ApplicationController
     homeworks = homeworks.published_no_end.includes(:homework_group_settings, :homework_detail_manual, :homework_challenge_settings)
     course_students = @course.students
     charge_group_ids = @course.charge_group_ids(current_user)
-    end_groups = charge_group_ids & params[:group_ids] if params[:group_ids]
+    group_ids = params[:group_ids]&.reject(&:blank?).map(&:to_i)
+    end_groups = charge_group_ids & group_ids if group_ids
 
     begin
       homeworks.each do |homework|