diff --git a/registry/polaris/registry.go b/registry/polaris/registry.go
index d95ea8e59a..1417ba9366 100644
--- a/registry/polaris/registry.go
+++ b/registry/polaris/registry.go
@@ -46,7 +46,8 @@ var localIP = ""
 
 const (
 	// RegistryConnDelay registry connection delay
-	RegistryConnDelay = 3
+	RegistryConnDelay           = 3
+	defaultHeartbeatIntervalSec = 5
 )
 
 func init() {
@@ -291,7 +292,7 @@ func createRegisterParam(url *common.URL, serviceName string) *api.InstanceRegis
 	})
 	metadata[constant.PolarisDubboPath] = url.Path
 
-	return &api.InstanceRegisterRequest{
+	req := &api.InstanceRegisterRequest{
 		InstanceRegisterRequest: model.InstanceRegisterRequest{
 			Service:   serviceName,
 			Namespace: url.GetParam(constant.PolarisNamespace, constant.PolarisDefaultNamespace),
@@ -301,6 +302,10 @@ func createRegisterParam(url *common.URL, serviceName string) *api.InstanceRegis
 			Metadata:  metadata,
 		},
 	}
+
+	req.SetTTL(defaultHeartbeatIntervalSec)
+
+	return req
 }
 
 // createDeregisterParam convert dubbo url to polaris instance deregister request
diff --git a/registry/polaris/service_discovery.go b/registry/polaris/service_discovery.go
index 6ae06c8401..605be176a3 100644
--- a/registry/polaris/service_discovery.go
+++ b/registry/polaris/service_discovery.go
@@ -94,9 +94,9 @@ func (polaris *polarisServiceDiscovery) Destroy() error {
 		inst.cancel()
 
 		err := polaris.Unregister(inst.instance)
-		logger.Infof("Unregister nacos instance:%+v", inst)
+		logger.Infof("Unregister polaris instance:%+v", inst)
 		if err != nil {
-			logger.Errorf("Unregister nacos instance:%+v, err:%+v", inst, err)
+			logger.Errorf("Unregister polaris instance:%+v, err:%+v", inst, err)
 		}
 	}
 	polaris.provider.Destroy()