diff --git a/README.MD b/README.MD
index 12f8bfc..bc46240 100644
--- a/README.MD
+++ b/README.MD
@@ -28,6 +28,15 @@ go build
         ssh port (default 22) //主机的 SSH 端口，默认 22
   -u string
         username //主机的 SSH 用户名
+  -j string
+        jsonFile //保存大量主机，包括主机地址，SSH用户名，SSH密码，SSH端口，所需执行的cmd指令文件地址
+  -outTxt bool
+        outTxt (default false) //是否允许把结果保存到文件中，true为允许  false为默认值
+  -t duration
+        timeLimit (default 30) //最大并发访问时间 默认为30s
+  -n int
+        numLimit (default 20) //最大并发访问量 默认为20
+
 ```
 **cmdfile 示例**
 ```
@@ -102,3 +111,20 @@ sw-2#exit
 10.10.15.102  ssh end
 ```
 
+#### ipfile
+```
+./multissh -j jsonSample.json -t 30 -n 20 -outTxt true
+10.10.15.101  ssh start
+sw-1#show clock
+05:29:43.269 UTC Tue Jun 6 2017
+sw-1#exit
+
+10.10.15.101  ssh end
+
+10.10.15.102  ssh start
+sw-2#show clock
+05:27:41.332 UTC Tue Jun 6 2017
+sw-2#exit
+
+10.10.15.102  ssh end
+```
\ No newline at end of file
diff --git a/main.go b/main.go
index ed05b1d..73bfe28 100644
--- a/main.go
+++ b/main.go
@@ -7,6 +7,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
 	//	"github.com/bitly/go-simplejson"
 )
 
@@ -28,13 +29,13 @@ func main() {
 	cmd := flag.String("cmd", "", "cmds")
 	username := flag.String("u", "", "username")
 	password := flag.String("p", "", "password")
-	port := flag.String("port", "", "ssh port")
+	port := flag.Int("port", 22, "ssh port")
 	cmdFile := flag.String("cmdfile", "", "cmdfile path")
 	hostFile := flag.String("hostfile", "", "hostfile path")
 	ipFile := flag.String("ipfile", "", "hostfile path")
 	cfg := flag.String("cfg", "", "cfg path")
 	//gu
-	jsonFile := flag.String("j", "ssh.json", "Json File Path")
+	jsonFile := flag.String("j", "", "Json File Path")
 	outTxt := flag.Bool("outTxt", false, "write result into txt")
 	timeLimit := flag.Duration("t", 30, "max timeout")
 	numLimit := flag.Int("n", 20, "max execute number")
@@ -43,10 +44,6 @@ func main() {
 	var cmdList []string
 	var hostList []string
 	var err error
-	//gu
-	var usernameList []string
-	var passwordList []string
-	var portList []string
 
 	sshHosts := []SSHHost{}
 	var host_Struct SSHHost
@@ -70,19 +67,6 @@ func main() {
 		hostList = strings.Split(*hosts, ";")
 	}
 
-	//gu
-	if *username != "" {
-		usernameList = strings.Split(*username, ";")
-	}
-
-	if *password != "" {
-		passwordList = strings.Split(*password, ";")
-	}
-
-	if *port != "" {
-		portList = strings.Split(*port, ";")
-	}
-	////
 	if *cmdFile != "" {
 		cmdList, err = Getfile(*cmdFile)
 		if err != nil {
@@ -94,11 +78,11 @@ func main() {
 		cmdList = strings.Split(*cmd, ";")
 	}
 	if *cfg == "" {
-		for pos, host := range hostList {
+		for _, host := range hostList {
 			host_Struct.Host = host
-			host_Struct.Username = usernameList[pos]
-			host_Struct.Password = passwordList[pos]
-			host_Struct.Port, _ = strconv.Atoi(portList[pos])
+			host_Struct.Username = *username
+			host_Struct.Password = *password
+			host_Struct.Port = *port
 			host_Struct.Cmd = cmdList
 			sshHosts = append(sshHosts, host_Struct)
 		}
@@ -140,7 +124,7 @@ func main() {
 		}
 	*/
 	//fmt.Println(sshhosts)
-	chLimit := make(chan bool, numLimit)
+	chLimit := make(chan bool, *numLimit) //控制并发访问量
 	chs := make([]chan string, len(sshHosts))
 	limitFunc := func(chLimit chan bool, ch chan string, host SSHHost) {
 		dossh(host.Username, host.Password, host.Host, host.Cmd, host.Port, ch)
@@ -163,11 +147,12 @@ func main() {
 			log.Println("SSH run timeout")
 			sshHosts[i].Result += ("SSH run timeout：" + strconv.Itoa(int(*timeLimit)) + "second.")
 		}
+
 		fmt.Println(sshHosts[i].Host, " ssh end")
 	}
 
 	//gu
-	if *outTxt {
+	if !*outTxt {
 		for i := 0; i < len(sshHosts); i++ {
 			err = WriteIntoTxt(sshHosts[i])
 			if err != nil {
diff --git a/sshconnect.go b/sshconnect.go
index c44ffcb..c11ad2b 100644
--- a/sshconnect.go
+++ b/sshconnect.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net"
 	//"os"
+
 	"time"
 
 	"golang.org/x/crypto/ssh"
@@ -78,6 +79,7 @@ func dossh(username, password, ip string, cmdlist []string, port int, ch chan st
 
 	}
 	session.Wait()
+
 	ch <- (outbt.String() + errbt.String())
 	//<-chLimit
 	return