diff --git a/app/controllers/task_banks_controller.rb b/app/controllers/task_banks_controller.rb
index 82ce14b0c..2b1a400ef 100644
--- a/app/controllers/task_banks_controller.rb
+++ b/app/controllers/task_banks_controller.rb
@@ -12,7 +12,7 @@ class TaskBanksController < ApplicationController
     ActiveRecord::Base.transaction do
       begin
         @bank.update_attributes(gtask_bank_params)
-        Attachment.associate_container(params[:attachment_ids], @bank.id, @bank.class) if params[:attachment_ids].blank?
+        Attachment.associate_container(params[:attachment_ids], @bank.id, @bank.class) if params[:attachment_ids]
         normal_status(0, "更新成功")
       rescue Exception => e
         uid_logger(e.message)