diff --git a/app/controllers/challenges_controller.rb b/app/controllers/challenges_controller.rb
index 856afeb01..33963a192 100644
--- a/app/controllers/challenges_controller.rb
+++ b/app/controllers/challenges_controller.rb
@@ -150,9 +150,8 @@ class ChallengesController < ApplicationController
 
   def index
     uid_logger("identifier: #{params}")
-    # 通过调试发现 这里includes(:games)性能会慢10倍
-    current_myshixun = @shixun.current_myshixun(current_user.id)
-    @challenges = @shixun.challenges.includes(:games).where("games.user_id" => (current_myshixun ? current_user.id : nil))
+
+    @challenges = Challenge.fields_for_list.where(shixun_id: @shixun.id)
 
     @editable = @shixun.status == 0 # before_action：有判断权限，如果没发布，则肯定是管理人员
     @user = current_user