diff --git a/pkg/karmadactl/get.go b/pkg/karmadactl/get.go
index 7f629819e..f8e79bb81 100644
--- a/pkg/karmadactl/get.go
+++ b/pkg/karmadactl/get.go
@@ -71,7 +71,7 @@ func NewCmdGet(karmadaConfig KarmadaConfig, parentCommand string) *cobra.Command
 		SilenceUsage:          true,
 		Example:               getExample(parentCommand),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			if err := o.Complete(); err != nil {
+			if err := o.Complete(karmadaConfig); err != nil {
 				return err
 			}
 			if err := o.Validate(cmd); err != nil {
@@ -87,7 +87,7 @@ func NewCmdGet(karmadaConfig KarmadaConfig, parentCommand string) *cobra.Command
 	o.GlobalCommandOptions.AddFlags(cmd.Flags())
 	o.PrintFlags.AddFlags(cmd)
 
-	cmd.Flags().StringVarP(&o.Namespace, "namespace", "n", "default", "-n=namespace or -n namespace")
+	cmd.Flags().StringVarP(&o.Namespace, "namespace", "n", o.Namespace, "-n=namespace or -n namespace")
 	cmd.Flags().StringVarP(&o.LabelSelector, "labels", "l", "", "-l=label or -l label")
 	cmd.Flags().StringSliceVarP(&o.Clusters, "clusters", "C", []string{}, "-C=member1,member2")
 	cmd.Flags().StringVar(&o.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster secrets are stored.")
@@ -152,9 +152,17 @@ func NewCommandGetOptions(parent string, streams genericclioptions.IOStreams) *C
 }
 
 // Complete takes the command arguments and infers any remaining options.
-func (g *CommandGetOptions) Complete() error {
+func (g *CommandGetOptions) Complete(karmadaConfig KarmadaConfig) error {
 	newScheme := gclient.NewSchema()
 
+	if g.Namespace == "" {
+		namespace, _, err := karmadaConfig.GetClientConfig(g.KarmadaContext, g.KubeConfig).Namespace()
+		if err != nil {
+			return err
+		}
+		g.Namespace = namespace
+	}
+
 	templateArg := ""
 	if g.PrintFlags.TemplateFlags != nil && g.PrintFlags.TemplateFlags.TemplateArgument != nil {
 		templateArg = *g.PrintFlags.TemplateFlags.TemplateArgument