diff --git a/README.md b/README.md
index f584424c..e43aa293 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,7 @@ Examples:
   kubefwd svc -n default -d internal.example.com
   kubefwd svc -n the-project -x prod-cluster
   kubefwd svc -n the-project -m 80:8080 -m 443:1443
+  kubefwd svc -n the-project --all-namespaces
 
 
 Flags:
@@ -150,6 +151,7 @@ Flags:
   -n, --namespace strings   Specify a namespace. Specify multiple namespaces by duplicating this argument.
   -l, --selector string     Selector (label query) to filter on; supports '=', '==', '!=' (e.g. -l key1=value1,key2=value2) and 'in' (e.g. -l "app in (value1, value2)").
   -m, --mapping strings     Specify a port mapping. Specify multiple mapping by duplicating this argument.
+  --all-namespaces          Enable --all-namespaces or -A option like kubectl.
   -v, --verbose             Verbose output.
 ```
 
diff --git a/README_CN.md b/README_CN.md
index 8aa04f7c..f01b42f8 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -129,6 +129,7 @@ Examples:
   kubefwd svc -n default -d internal.example.com
   kubefwd svc -n the-project -x prod-cluster
   kubefwd svc -n the-project -m 80:8080 -m 443:1443
+  kubefwd svc -n the-project --all-namespaces
   
 
 Flags:
@@ -140,6 +141,7 @@ Flags:
   -n, --namespace strings   Specify a namespace. Specify multiple namespaces by duplicating this argument.
   -l, --selector string     Selector (label query) to filter on; supports '=', '==', and '!=' (e.g. -l key1=value1,key2=value2).
   -m, --mapping strings     Specify a port mapping. Specify multiple mapping by duplicating this argument.
+  --all-namespaces          Enable --all-namespaces or -A option like kubectl.
   -v, --verbose             Verbose output.
 ```
 
diff --git a/cmd/kubefwd/kubefwd.go b/cmd/kubefwd/kubefwd.go
index 5cc8fec2..842bed60 100644
--- a/cmd/kubefwd/kubefwd.go
+++ b/cmd/kubefwd/kubefwd.go
@@ -47,7 +47,8 @@ func newRootCmd() *cobra.Command {
 			"  kubefwd svc -n the-project -f metadata.name=service-name\n" +
 			"  kubefwd svc -n default -l \"app in (ws, api)\"\n" +
 			"  kubefwd svc -n default -n the-project\n" +
-			"  kubefwd svc -n the-project -m 80:8080 -m 443:1443\n",
+			"  kubefwd svc -n the-project -m 80:8080 -m 443:1443\n" +
+			"  kubefwd svc --all-namespaces",
 
 		Long: globalUsage,
 	}
diff --git a/cmd/kubefwd/services/services.go b/cmd/kubefwd/services/services.go
index 8a775cf2..4fcba77b 100644
--- a/cmd/kubefwd/services/services.go
+++ b/cmd/kubefwd/services/services.go
@@ -55,6 +55,7 @@ var contexts []string
 var verbose bool
 var domain string
 var mappings []string
+var isAllNs bool
 
 func init() {
 	// override error output from k8s.io/apimachinery/pkg/util/runtime
@@ -71,6 +72,7 @@ func init() {
 	Cmd.Flags().BoolVarP(&verbose, "verbose", "v", false, "Verbose output.")
 	Cmd.Flags().StringVarP(&domain, "domain", "d", "", "Append a pseudo domain name to generated host names.")
 	Cmd.Flags().StringSliceVarP(&mappings, "mapping", "m", []string{}, "Specify a port mapping. Specify multiple mapping by duplicating this argument.")
+	Cmd.Flags().BoolVarP(&isAllNs, "all-namespaces", "A", false, "Enable --all-namespaces option like kubectl.")
 
 }
 
@@ -85,10 +87,22 @@ var Cmd = &cobra.Command{
 		"  kubefwd svc -n default -n the-project\n" +
 		"  kubefwd svc -n default -d internal.example.com\n" +
 		"  kubefwd svc -n the-project -x prod-cluster\n" +
-		"  kubefwd svc -n the-project -m 80:8080 -m 443:1443\n",
+		"  kubefwd svc -n the-project -m 80:8080 -m 443:1443\n" +
+		"  kubefwd svc --all-namespaces",
 	Run: runCmd,
 }
 
+// setAllNamespace Form V1Core get all namespace
+func setAllNamespace(clientSet *kubernetes.Clientset, options metav1.ListOptions, namespaces *[]string) {
+	nsList, err := clientSet.CoreV1().Namespaces().List(context.TODO(), options)
+	if err != nil {
+		log.Fatalf("Error get all namespaces by CoreV1: %s\n", err.Error())
+	}
+	for _, ns := range nsList.Items {
+		*namespaces = append(*namespaces, ns.Name)
+	}
+}
+
 // checkConnection tests if you can connect to the cluster in your config,
 // and if you have the necessary permissions to use kubefwd.
 func checkConnection(clientSet *kubernetes.Clientset, namespaces []string) error {
@@ -258,6 +272,14 @@ Try:
 			log.Fatalf("Error creating k8s clientSet: %s\n", err.Error())
 		}
 
+		// if use --all-namespace ,from v1 api get all ns.
+		if isAllNs {
+			if len(namespaces) > 1 {
+				log.Fatalf("Error: cannot combine options --all-namespaces and -n.")
+			}
+			setAllNamespace(clientSet, listOptions, &namespaces)
+		}
+
 		// check connectivity
 		err = checkConnection(clientSet, namespaces)
 		if err != nil {
@@ -443,7 +465,7 @@ func (opts *NamespaceOpts) UpdateServiceHandler(_ interface{}, new interface{})
 	}
 }
 
-// parse string port to PortMap
+// ParsePortMap parse string port to PortMap
 func (opts *NamespaceOpts) ParsePortMap(mappings []string) *[]fwdservice.PortMap {
 	var portList []fwdservice.PortMap
 	if mappings == nil {