diff --git a/README.md b/README.md
index e97a9ce..727b679 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ metadata:
   name: kind-test
   namespace: kubesphere-system
   annotations:
-    tower.kubesphere.io/external-lb-service-annoations: '{"eip.porter.kubesphere.io/v1alpha2":"porter-bgp-eip","lb.kubesphere.io/v1alpha1":"porter","protocol.porter.kubesphere.io/v1alpha1":"bgp"}'
+    tower.kubesphere.io/external-lb-service-annotations: '{"eip.porter.kubesphere.io/v1alpha2":"porter-bgp-eip","lb.kubesphere.io/v1alpha1":"porter","protocol.porter.kubesphere.io/v1alpha1":"bgp"}'
 spec:
   connection:
     type: proxy
@@ -98,4 +98,4 @@ spec:
   externalKubeAPIEnabled: true
 ```
 
-With `externalKubeAPIEnabled=true` and `connection.type=proxy` tower will create the serivce with `LoadBlancer` type, content in annotation with key `tower.kubesphere.io/external-lb-service-annoations` will be applied to the service anntations as k-v, so that your can control how the `ccm` process the service.
\ No newline at end of file
+With `externalKubeAPIEnabled=true` and `connection.type=proxy` tower will create the serivce with `LoadBlancer` type, content in annotation with key `tower.kubesphere.io/external-lb-service-annotations` will be applied to the service anntations as k-v, so that your can control how the `ccm` process the service.
\ No newline at end of file
diff --git a/pkg/proxy/proxy.go b/pkg/proxy/proxy.go
index 61fb2c5..ee4158c 100644
--- a/pkg/proxy/proxy.go
+++ b/pkg/proxy/proxy.go
@@ -583,7 +583,10 @@ func (s *Proxy) addCluster(cluster *v1alpha1.Cluster) error {
 
 func updateServiceByExternalKubeAPI(cluster *v1alpha1.Cluster, service *corev1.Service) {
 	// get lb annotations from cluster annotations
-	externalLBAnnotations, ok := cluster.Annotations["tower.kubesphere.io/external-lb-service-annoations"]
+	externalLBAnnotations, ok := cluster.Annotations["tower.kubesphere.io/external-lb-service-annotations"]
+	if !ok {
+		externalLBAnnotations, ok = cluster.Annotations["tower.kubesphere.io/external-lb-service-annoations"]
+	}
 	if ok {
 		var annotation map[string]string
 		if err := json.Unmarshal([]byte(externalLBAnnotations), &annotation); err != nil {
@@ -717,7 +720,7 @@ func (s *Proxy) allocatePort() (uint16, error) {
 		for _, item := range clusters.Items {
 			if item.Spec.Connection.Type == v1alpha1.ConnectionTypeProxy &&
 				item.Spec.Connection.KubernetesAPIServerPort != 0 &&
-				item.Spec.Connection.KubeSphereAPIServerPort == port {
+				item.Spec.Connection.KubernetesAPIServerPort == port {
 				collision = true
 				break
 			}