diff --git a/app/services/shixuns_service.rb b/app/services/shixuns_service.rb
index 887f07c4..707d1760 100644
--- a/app/services/shixuns_service.rb
+++ b/app/services/shixuns_service.rb
@@ -74,11 +74,9 @@ class ShixunsService
       discusses = Discuss.limit(LIMIT).where(:dis_id => dis_id, :dis_type => dis_type,
                                              :root_id => nil).includes(:user, :praise_tread).offset(offset)
     else
-      disscusses = Discuss.where("dis_id = :dis_id and dis_type = :dis_type and root_id = :root_id and
+      disscusses = Discuss.where("dis_id = :dis_id and dis_type = :dis_type and root_id is null and
                                       (hidden = :hidden or user_id = :user_id)",
-                                     {dis_id: dis_id, dis_type: dis_type, root_id: nil, hidden: false,
-                                      user_id: current_user.id})
-
+                                     {dis_id: dis_id, dis_type: dis_type, hidden: false, user_id: current_user.id})
       disscuss_count = disscusses.count
       discusses = disscusses.limit(LIMIT).includes(:user, :praise_tread).offset(offset)
     end