diff --git a/cmd/bitsrun/main.go b/cmd/bitsrun/main.go
index ff610ec..283b314 100644
--- a/cmd/bitsrun/main.go
+++ b/cmd/bitsrun/main.go
@@ -6,6 +6,7 @@ import (
 	"github.com/Mmx233/BitSrunLoginGo/internal/global"
 	"github.com/Mmx233/BitSrunLoginGo/tools"
 	log "github.com/sirupsen/logrus"
+	"net"
 )
 
 func main() {
@@ -19,7 +20,21 @@ func main() {
 		//登录流程
 		var err error
 		if global.Config.Settings.Basic.Interfaces == "" { //单网卡
-			if err = controllers.Login(nil, false); err != nil {
+			var eth *tools.Eth
+			if global.Flags.Interface != "" {
+				netEth, e := net.InterfaceByName(global.Flags.Interface)
+				if e != nil {
+					log.Warnf("获取指定网卡 %s 失败，使用默认网卡: %v", global.Flags.Interface, e)
+				} else {
+					eth, e = tools.ConvertInterface(*netEth)
+					if e != nil {
+						log.Warnf("获取指定网卡 %s ip 地址失败，使用默认网卡: %v", global.Flags.Interface, e)
+					} else if eth == nil {
+						log.Warnf("指定网卡 %s 无可用 ip 地址，使用默认网卡", global.Flags.Interface)
+					}
+				}
+			}
+			if err = controllers.Login(eth, false); err != nil {
 				log.Errorln("登录出错: ", err)
 				if !global.Config.Settings.Log.DebugLevel {
 					fmt.Printf("开启调试日志（debug_level）获取详细信息")
@@ -28,7 +43,7 @@ func main() {
 			}
 		} else { //多网卡
 			log.Infoln("多网卡模式")
-			interfaces, _ := tools.GetInterfaceAddr()
+			interfaces, _ := tools.GetInterfaceAddr(global.Config.Settings.Basic.Interfaces)
 			for _, eth := range interfaces {
 				log.Infoln("使用网卡: ", eth.Name)
 				if err = controllers.Login(&eth, false); err != nil {
diff --git a/internal/global/flags.go b/internal/global/flags.go
index 9880692..b8b4b79 100644
--- a/internal/global/flags.go
+++ b/internal/global/flags.go
@@ -11,10 +11,13 @@ var Flags struct {
 	RunningDaemon bool
 	//强制daemon
 	Daemon bool
+
+	Interface string
 }
 
 func initFlags() {
 	flag.StringVar(&Flags.Path, "config", "Config.yaml", "config path")
+	flag.StringVar(&Flags.Interface, "interface", "", "specify the eth name")
 	flag.BoolVar(&Flags.RunningDaemon, "running-daemon", false, "")
 	flag.BoolVar(&Flags.Daemon, "daemon", false, "")
 	flag.Parse()
diff --git a/tools/eth.go b/tools/eth.go
index b14d66b..edb21c3 100644
--- a/tools/eth.go
+++ b/tools/eth.go
@@ -1,7 +1,6 @@
 package tools
 
 import (
-	"github.com/Mmx233/BitSrunLoginGo/internal/global"
 	log "github.com/sirupsen/logrus"
 	"net"
 	"regexp"
@@ -13,38 +12,50 @@ type Eth struct {
 	Addr net.Addr
 }
 
-func GetInterfaceAddr() ([]Eth, error) {
+// ConvertInterface 当没有 ipv4 地址时 eth 可能为 nil
+func ConvertInterface(eth net.Interface) (*Eth, error) {
+	addresses, e := eth.Addrs()
+	if e != nil {
+		return nil, e
+	}
+	for _, addr := range addresses {
+		if strings.Contains(addr.String(), ".") {
+			var ip *net.TCPAddr
+			ip, e = net.ResolveTCPAddr("tcp", strings.Split(addr.String(), "/")[0]+":0")
+			if e != nil {
+				log.Warnln(eth.Name+" ip解析失败：", e)
+				continue
+			}
+			return &Eth{
+				Name: eth.Name,
+				Addr: ip,
+			}, nil
+		}
+	}
+	return nil, nil
+}
+
+func GetInterfaceAddr(regexpStr string) ([]Eth, error) {
 	var result []Eth
 
 	interfaces, e := net.Interfaces()
 	if e != nil {
 		return nil, e
 	}
-	reg, e := regexp.Compile(global.Config.Settings.Basic.Interfaces)
+	reg, e := regexp.Compile(regexpStr)
 	if e != nil {
 		log.Fatalln("interfaces设置异常，无法解析: ", e)
 	}
 	for _, eth := range interfaces {
 		if reg.Match([]byte(eth.Name)) {
-			addrs, e := eth.Addrs()
+			cEth, e := ConvertInterface(eth)
 			if e != nil {
 				log.Warnln(eth.Name+" 网卡地址获取失败: ", e)
 				continue
 			}
-			for _, addr := range addrs {
-				if strings.Contains(addr.String(), ".") {
-					var ip *net.TCPAddr
-					ip, e = net.ResolveTCPAddr("tcp", strings.Split(addr.String(), "/")[0]+":0")
-					if e != nil {
-						log.Warnln(eth.Name+" ip解析失败：", e)
-						continue
-					}
-					result = append(result, Eth{
-						Name: eth.Name,
-						Addr: ip,
-					})
-					break
-				}
+
+			if cEth != nil {
+				result = append(result, *cEth)
 			}
 		} else {
 			log.Debugf("网卡 %s 不匹配", eth.Name)