diff --git a/README.md b/README.md
index c4a23b5..8db4c4c 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ This repository contains the Nebula Graph Console for Nebula Graph 3.x. Nebula G
     | `-P/-port`      | Sets the port number of the graphd service.       |
     | `-u/-user`      | Sets the username of your Nebula Graph account. See [authentication](https://docs.nebula-graph.io/2.0/7.data-security/1.authentication/1.authentication/).      |
     | `-p/-password`  | Sets the password of your Nebula Graph account.   |
-    | `-t/-timeout`   | Sets an integer-type timeout threshold for the connection. The unit is second. The default value is 120.    |
+    | `-t/-timeout`   | Sets an integer-type timeout threshold for the connection. The unit is millisecond. The default value is 120.    |
     | `-e/-eval`      | Sets a string-type nGQL statement. The nGQL statement is executed once the connection succeeds. The connection stops after the result is returned.   |
     | `-f/-file`      | Sets the path of an nGQL file. The nGQL statements in the file are executed once the connection succeeds. You'll get the return messages and the connection stops then.      |
     | `-enable_ssl`   | Enable SSL when connecting to Nebula Graph |
diff --git a/main.go b/main.go
index 57c7e6b..4588a32 100644
--- a/main.go
+++ b/main.go
@@ -440,7 +440,7 @@ var (
 	port                  *int    = flag.Int("P", -1, "The Nebula Graph Port")
 	username              *string = flag.String("u", "", "The Nebula Graph login user name")
 	password              *string = flag.String("p", "", "The Nebula Graph login password")
-	timeout               *int    = flag.Int("t", 0, "The Nebula Graph client connection timeout in seconds, 0 means never timeout")
+	timeout               *int    = flag.Int("t", 0, "The Nebula Graph client connection timeout in millisecond, 0 means never timeout")
 	script                *string = flag.String("e", "", "The nGQL directly")
 	file                  *string = flag.String("f", "", "The nGQL script file name")
 	version               *bool   = flag.Bool("v", false, "The Nebula Console version")
@@ -457,7 +457,7 @@ func init() {
 	flag.IntVar(port, "port", -1, "The Nebula Graph Port")
 	flag.StringVar(username, "user", "", "The Nebula Graph login user name")
 	flag.StringVar(password, "password", "", "The Nebula Graph login password")
-	flag.IntVar(timeout, "timeout", 0, "The Nebula Graph client connection timeout in seconds, 0 means never timeout")
+	flag.IntVar(timeout, "timeout", 0, "The Nebula Graph client connection timeout in millisecond, 0 means never timeout")
 	flag.StringVar(script, "eval", "", "The nGQL directly")
 	flag.StringVar(file, "file", "", "The nGQL script file name")
 }