diff --git a/components/playground/main.go b/components/playground/main.go
index 2a984afd71..09ce160f2c 100644
--- a/components/playground/main.go
+++ b/components/playground/main.go
@@ -122,6 +122,7 @@ Examples:
   $ tiup playground nightly --without-monitor       # Start a local cluster and disable monitor system
   $ tiup playground --pd.config ~/config/pd.toml    # Start a local cluster with specified configuration file
   $ tiup playground --db.binpath /xx/tidb-server    # Start a local cluster with component binary path
+  $ tiup playground --tag xx                           # Start a local cluster with data dir named 'xx' and uncleaned after exit
   $ tiup playground --mode tikv-slim                # Start a local tikv only cluster (No TiDB or TiFlash Available)
   $ tiup playground --mode tikv-slim --kv 3 --pd 3  # Start a local tikv only cluster with 6 nodes`,
 		SilenceUsage:  true,
@@ -278,7 +279,7 @@ Note: Version constraint [bold]%s[reset] is resolved to [green][bold]%s[reset].
 
 	rootCmd.Flags().StringVar(&options.Mode, "mode", "tidb", "TiUP playground mode: 'tidb', 'tidb-cse', 'tikv-slim'")
 	rootCmd.Flags().StringVar(&options.PDMode, "pd.mode", "pd", "PD mode: 'pd', 'ms'")
-	rootCmd.PersistentFlags().StringVarP(&tag, "tag", "T", "", "Specify a tag for playground") // Use `PersistentFlags()` to make it available to subcommands.
+	rootCmd.PersistentFlags().StringVarP(&tag, "tag", "T", "", "Specify a tag for playground, data dir of this tag will not be removed after exit")
 	rootCmd.Flags().Bool("without-monitor", false, "Don't start prometheus and grafana component")
 	rootCmd.Flags().BoolVar(&options.Monitor, "monitor", true, "Start prometheus and grafana component")
 	_ = rootCmd.Flags().MarkDeprecated("monitor", "Please use --without-monitor to control whether to disable monitor.")
diff --git a/components/playground/playground.go b/components/playground/playground.go
index 569b3b55a4..1522626ef6 100644
--- a/components/playground/playground.go
+++ b/components/playground/playground.go
@@ -1251,6 +1251,9 @@ func (p *Playground) bootCluster(ctx context.Context, env *environment.Environme
 		p.tiflashs = started
 		p.waitAllTiFlashUp()
 
+		fmt.Println()
+		color.New(color.FgYellow, color.Bold).Println("TiDB Playground Cluster will delete all data of the cluster after exit. Please use --tag xx to pin the data dir.")
+
 		fmt.Println()
 		color.New(color.FgGreen, color.Bold).Println("🎉 TiDB Playground Cluster is started, enjoy!")
 		fmt.Println()
diff --git a/doc/user/playground.md b/doc/user/playground.md
index ff3d68ca06..4f8dfe80b1 100644
--- a/doc/user/playground.md
+++ b/doc/user/playground.md
@@ -55,7 +55,7 @@ Flags:
       --pump int                 Pump instance number
       --pump.binpath string      Pump instance binary path
       --pump.config string       Pump instance configuration file
-  -T, --tag string               Specify a tag for playground
+  -T, --tag string               Specify a tag for playground, data dir of this tag will not be removed after exit
       --ticdc int                TiCDC instance number
       --ticdc.binpath string     TiCDC instance binary path
       --ticdc.config string      TiCDC instance configuration file