diff --git a/src/utils/mqtt/emqxUtil.js b/src/utils/mqtt/emqxUtil.js
index 721c4e7..1dfc076 100644
--- a/src/utils/mqtt/emqxUtil.js
+++ b/src/utils/mqtt/emqxUtil.js
@@ -53,6 +53,12 @@ export const GP12Topic = {
   SiteComLabelCode: title + '/gp12/SiteComLabelCode',
 }
 
+// 后道-topic
+export const BackEndTopic = {
+  // 后道标签扫码
+  SiteComLabelCode: title + '/backEnd/SiteComLabelCode',
+}
+
 export function createClient(clientId = null) {
   let _options = options
   if (clientId !== null) {