diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index c8cf36824..ff1ee4e96 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -1336,7 +1336,7 @@ class HomeworkCommonsController < ApplicationController
     shixun = @homework.shixuns.take
     # 通过代码文件来判断语言
     language = shixun.challenges.practice_type.pluck(:path).first
-    language = language.split("；")[0].split(".")[1].downcase if language.present?
+    language = language.split("；")[0].split(".").last.downcase if language.present?
     user_lists = []
     if language.present? && (language == "java" || language == "py")
       user_ids = @course.course_members.where(course_group_id: params[:group_ids]).distinct(:user_id).pluck(:user_id)