diff --git a/app/controllers/shixuns_controller.rb b/app/controllers/shixuns_controller.rb
index e3a658d7c..5f7c13964 100644
--- a/app/controllers/shixuns_controller.rb
+++ b/app/controllers/shixuns_controller.rb
@@ -622,7 +622,6 @@ class ShixunsController < ApplicationController
   end
 
   def add_collaborators
-      raise("搜索内容不能为空")  unless params[:search]
       member_ids = "(" + @shixun.shixun_members.map(&:user_id).join(',') +  ")"
       user_name = "%#{params[:user_name].strip}%"
       school_name = "%#{params[:school_name].strip}%"