diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index c2f3fb99a..dedbab55c 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1123,7 +1123,7 @@ class ExercisesController < ApplicationController
 
   # 学生提交试卷
   def commit_exercise
-    tip_exception(-1, "试卷已提交") if @answer_committed_user.commit_status == 1
+    tip_exception(0, "试卷截止时间已到，系统已自动提交") if @answer_committed_user.commit_status == 1
     ActiveRecord::Base.transaction do
       begin
         can_commit_exercise = false