diff --git a/app/helpers/courses_helper.rb b/app/helpers/courses_helper.rb
index ac22ed412..178782da3 100644
--- a/app/helpers/courses_helper.rb
+++ b/app/helpers/courses_helper.rb
@@ -328,7 +328,7 @@ module CoursesHelper
   #当前用户是不是指定课程的学生
   def is_cur_course_student course
     #course.members.joins(:member_roles).where("member_roles.role_id IN (:role_id) and members.user_id = #{User.current.id}", {:role_id => StudentRoles}).count != 0
-    !(User.current.allowed_to?(:as_teacher,course))
+    User.current.logged? && User.current.member_of_course?(course) && !(User.current.allowed_to?(:as_teacher,course))
     #修改：能新建占位且不能新建任务的角色判定为学生
     #is_student = false
     #@membership = User.current.memberships.all(:conditions => Project.visible_condition(User.current))