diff --git a/app/controllers/competition_teams_controller.rb b/app/controllers/competition_teams_controller.rb
index 5b68c433..4c558379 100644
--- a/app/controllers/competition_teams_controller.rb
+++ b/app/controllers/competition_teams_controller.rb
@@ -206,7 +206,7 @@ class CompetitionTeamsController < ApplicationController
       teacher_staff = @competition.competition_staffs.where(category: 'teacher').first
 
       if teacher_staff.blank?
-        @status, @message = -1, '该竞赛不能配备导师'
+        @status, @message = -1, '老师不能参加该竞赛'
         return
       end
 
@@ -217,7 +217,10 @@ class CompetitionTeamsController < ApplicationController
       team.team_members.create!(user_id: User.current.id, role: 3, competition_id: @competition.id, is_teacher: true)
     else
       max_member_count = @competition.competition_staffs.where('category != "teacher"').sum(:maximum)
-      if team.members.count + 1 > max_member_count
+      if max_member_count.zero?
+        @status, @message = -1, '学生不能参加该竞赛'
+        return
+      elsif team.members.count + 1 > max_member_count
         @status, @message = -1, '该战队成员人数已满'
         return
       end
@@ -279,7 +282,7 @@ class CompetitionTeamsController < ApplicationController
     teacher_count += 1 if is_teacher
     # 检查老师数量
     if teacher_staff.blank? && teacher_count > 0
-      @status, @message = -1, '该竞赛不能配备导师'
+      @status, @message = -1, '老师不能参与该竞赛'
       return false
     elsif teacher_staff.present? && (teacher_staff.minimum > teacher_count || teacher_staff.maximum < teacher_count)
       @status = -1
@@ -293,7 +296,10 @@ class CompetitionTeamsController < ApplicationController
     member_count = params[:member_ids].try(:size) || 0
     member_count += 1 unless is_teacher
     # 检查成员数据
-    if min_member_count > member_count || member_count > max_member_count
+    if member_relations.count.zero? && member_count > 0
+      @status, @message = -1, '学生不能参与该竞赛'
+      return false
+    elsif min_member_count > member_count || member_count > max_member_count
       @status = -1
       @message = min_member_count == max_member_count ? "成员数量应为#{max_member_count}人" : "成员数量应为#{min_member_count}-#{max_member_count}人"
       return false