diff --git a/app/views/homework_commons/show.json.jbuilder b/app/views/homework_commons/show.json.jbuilder
index e78166fe0..8d5abc8bc 100644
--- a/app/views/homework_commons/show.json.jbuilder
+++ b/app/views/homework_commons/show.json.jbuilder
@@ -4,11 +4,11 @@ json.partial! "homework_btn_check", locals: {identity: @user_course_identity, ho
 
 json.partial! "student_btn_check", locals: {identity: @user_course_identity, homework: @homework, work: @work}
 
-json.description @homework.description
-
 # 实训作业才有说明
 if @homework.homework_type == "practice"
   json.explanation @homework.explanation
+else
+  json.description @homework.description
 end
 
 # 附件