diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index 16e3db721..18411ee01 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -333,11 +333,12 @@ class PullRequestsController < ApplicationController
       end
 
       pushTXInfo["shas"] = shas # 后续修改为shaList
-      pushTXInfoJson = pushTXInfo.to_json
+      pushTXInfoJson = pushTXInfo.to_json.to_s
       # 发送交易
       Rails.logger.info("before executing chain_trustie command...")
       Rails.logger.info(pushTXInfoJson)
-      cmd = "chain_trustie pushPRTX " + pushTXInfoJson
+      cmd = "chain_trustie pushPRTX " +
+
       # result = system  # 执行失败了
       output = StringIO.new
       IO.popen(cmd) do |pipe|