diff --git a/jetlinks-components/common-component/src/main/java/org/jetlinks/community/PropertyConstants.java b/jetlinks-components/common-component/src/main/java/org/jetlinks/community/PropertyConstants.java
index d77174b9..210559bc 100644
--- a/jetlinks-components/common-component/src/main/java/org/jetlinks/community/PropertyConstants.java
+++ b/jetlinks-components/common-component/src/main/java/org/jetlinks/community/PropertyConstants.java
@@ -16,6 +16,7 @@ public interface PropertyConstants {
     Key<String> deviceName = Key.of("deviceName");
 
     Key<String> productId = Key.of("productId");
+    Key<String> uid = Key.of("_uid");
 
 
     @SuppressWarnings("all")