diff --git a/das/src/main/java/com/das/modules/node/service/TDEngineService.java b/das/src/main/java/com/das/modules/node/service/TDEngineService.java
index 39a586ea..0438de97 100644
--- a/das/src/main/java/com/das/modules/node/service/TDEngineService.java
+++ b/das/src/main/java/com/das/modules/node/service/TDEngineService.java
@@ -248,7 +248,7 @@ public class TDEngineService {
                     sb.append(iotModelCode);
                     sb.append(" tags (");
                     sb.append(dv.getDeviceId());
-                    sb.append(") (");
+                    sb.append(") (updatetime");
                     dv.getValues().forEach((key, value) ->
                             sb.append(",").append(key)
                     );
@@ -286,7 +286,7 @@ public class TDEngineService {
                     sb.append(iotModelCode);
                     sb.append(" tags (");
                     sb.append(dv.getDeviceId());
-                    sb.append(") (");
+                    sb.append(") (updatetime");
                     dv.getValues().forEach((key, value) ->
                             sb.append(",").append(key)
                     );