diff --git a/system/p2p/dht/bootstrap.go b/system/p2p/dht/bootstrap.go
index 8eb4c81b3..d32069db5 100644
--- a/system/p2p/dht/bootstrap.go
+++ b/system/p2p/dht/bootstrap.go
@@ -2,6 +2,7 @@ package dht
 
 import (
 	"context"
+	"time"
 
 	"github.com/33cn/chain33/system/p2p/dht/extension"
 	p2pty "github.com/33cn/chain33/system/p2p/dht/types"
@@ -11,7 +12,7 @@ import (
 	"github.com/multiformats/go-multiaddr"
 )
 
-func initInnerPeers(host host.Host, peersInfo []peer.AddrInfo, cfg *p2pty.P2PSubConfig) {
+func initInnerPeers(ctx context.Context, host host.Host, peersInfo []peer.AddrInfo, cfg *p2pty.P2PSubConfig) {
 
 	for _, node := range cfg.Seeds {
 		info := genAddrInfo(node)
@@ -57,7 +58,7 @@ func initInnerPeers(host host.Host, peersInfo []peer.AddrInfo, cfg *p2pty.P2PSub
 			//加保护
 			host.ConnManager().Protect(info.ID, "relayNode")
 			//向中继节点申请一个通信插槽，以便通过中继节点连接到自己
-			extension.MakeNodeRelayClient(host, info)
+			go extension.ReserveRelaySlot(ctx, host, *info, time.Minute)
 
 		}
 	}
diff --git a/system/p2p/dht/bootstrap_test.go b/system/p2p/dht/bootstrap_test.go
index 1b51d7b01..52156a974 100644
--- a/system/p2p/dht/bootstrap_test.go
+++ b/system/p2p/dht/bootstrap_test.go
@@ -48,7 +48,7 @@ func Test_initInnerPeers(t *testing.T) {
 	subcfg.RelayEnable = true
 	subcfg.RelayNodeAddr = []string{h0str}
 	peerinfo := []peer.AddrInfo{{ID: h7.ID, Addrs: h7.Addrs}}
-	initInnerPeers(hosts[5], peerinfo, subcfg)
+	initInnerPeers(ctx, hosts[5], peerinfo, subcfg)
 	hosts[5].Close()
 
 }
diff --git a/system/p2p/dht/discovery.go b/system/p2p/dht/discovery.go
index 703eedac4..07250e6c6 100644
--- a/system/p2p/dht/discovery.go
+++ b/system/p2p/dht/discovery.go
@@ -55,7 +55,7 @@ func InitDhtDiscovery(ctx context.Context, host host.Host, peersInfo []peer.Addr
 //Start  the dht
 func (d *Discovery) Start() {
 	//连接内置种子，以及addrbook存储的节点
-	go initInnerPeers(d.host, d.bootstraps, d.subCfg)
+	go initInnerPeers(d.ctx, d.host, d.bootstraps, d.subCfg)
 	// Bootstrap the DHT. In the default configuration, this spawns a Background
 	// thread that will refresh the peer table every five minutes.
 	if err := d.kademliaDHT.Bootstrap(d.ctx); err != nil {
diff --git a/system/p2p/dht/extension/mdns.go b/system/p2p/dht/extension/mdns.go
index a4a50db4c..5eae737f7 100644
--- a/system/p2p/dht/extension/mdns.go
+++ b/system/p2p/dht/extension/mdns.go
@@ -28,7 +28,7 @@ func (n *discoveryNotifee) HandlePeerFound(pi peer.AddrInfo) {
 func NewMDNS(ctx context.Context, peerhost host.Host, serviceTag string) (*MDNS, error) {
 	//register with service so that we get notified about peer discovery
 	notifee := &discoveryNotifee{}
-	notifee.PeerChan = make(chan peer.AddrInfo)
+	notifee.PeerChan = make(chan peer.AddrInfo, 1)
 	ser := discovery.NewMdnsService(peerhost, serviceTag, notifee)
 	mnds := new(MDNS)
 	mnds.Service = ser
diff --git a/system/p2p/dht/extension/mdns_test.go b/system/p2p/dht/extension/mdns_test.go
index f106444ea..abca30bdb 100644
--- a/system/p2p/dht/extension/mdns_test.go
+++ b/system/p2p/dht/extension/mdns_test.go
@@ -2,6 +2,7 @@ package extension
 
 import (
 	"context"
+	"github.com/libp2p/go-libp2p/core/peer"
 	"testing"
 	"time"
 
@@ -24,8 +25,9 @@ func Test_mdns(t *testing.T) {
 	select {
 	case peerinfo := <-tmdns.PeerChan():
 		t.Log("findMdns", peerinfo.ID)
-	case <-time.After(time.Second * 10):
+	case <-time.After(time.Second * 5):
 		return
 	}
+	tmdns.notifee.HandlePeerFound(peer.AddrInfo{})
 
 }
diff --git a/system/p2p/dht/extension/pubsub.go b/system/p2p/dht/extension/pubsub.go
index bed8d1b0b..4ace97545 100644
--- a/system/p2p/dht/extension/pubsub.go
+++ b/system/p2p/dht/extension/pubsub.go
@@ -15,7 +15,7 @@ import (
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 )
 
-var log = log15.New("module", "pubsub")
+var log = log15.New("module", "extension")
 
 var setOnce sync.Once
 
diff --git a/system/p2p/dht/extension/relay.go b/system/p2p/dht/extension/relay.go
index 57d3803a9..35c019fa8 100644
--- a/system/p2p/dht/extension/relay.go
+++ b/system/p2p/dht/extension/relay.go
@@ -49,26 +49,28 @@ func MakeNodeRelayService(host host.Host, opts []circuit.Option) *Relay {
 	return r
 }
 
-func MakeNodeRelayClient(host host.Host, relayInfo *peer.AddrInfo) {
+// ReserveRelaySlot reserve relay slot
+func ReserveRelaySlot(ctx context.Context, host host.Host, relayInfo peer.AddrInfo, timeout time.Duration) {
 	//向中继节点申请一个通信插槽
-	rs, err := circuitClient.Reserve(context.Background(), host, *relayInfo)
-	if err != nil {
-		return
-	}
-	go func(reserve *circuitClient.Reservation) {
-		var ticker = time.NewTicker(time.Second * 5)
-		for {
-			select {
-			case <-ticker.C:
-				if reserve.Expiration.Before(time.Now()) {
-					reserve, err = circuitClient.Reserve(context.Background(), host, *relayInfo)
-					if err != nil {
-						return
-					}
+
+	var ticker = time.NewTicker(timeout)
+	var err error
+	var reserve *circuitClient.Reservation
+	for {
+		select {
+		case <-ctx.Done():
+			ticker.Stop()
+			return
+		case <-ticker.C:
+			if reserve == nil || reserve.Expiration.Before(time.Now()) {
+				reserve, err = circuitClient.Reserve(context.Background(), host, relayInfo)
+				if err != nil {
+					log.Error("ReserveRelaySlot", "err", err)
+					return
 				}
 			}
 		}
-	}(rs)
+	}
 
 }
 
diff --git a/system/p2p/dht/extension/relay_test.go b/system/p2p/dht/extension/relay_test.go
index e7e01547e..adeeb70e9 100644
--- a/system/p2p/dht/extension/relay_test.go
+++ b/system/p2p/dht/extension/relay_test.go
@@ -7,8 +7,6 @@ import (
 
 	ma "github.com/multiformats/go-multiaddr"
 
-	"github.com/libp2p/go-libp2p/p2p/protocol/circuitv2/client"
-
 	"github.com/libp2p/go-libp2p/core/network"
 
 	"github.com/libp2p/go-libp2p/core/peer"
@@ -103,12 +101,11 @@ func TestRelayV2(t *testing.T) {
 	err = unreachable2.Connect(ctx, relayInfo)
 	assert.Nil(t, err)
 
+	go ReserveRelaySlot(ctx, unreachable1, unreachable2info, time.Millisecond)
+
 	//unreachable2 向中继节点申请一个中继槽slot
-	reserve, err := client.Reserve(ctx, unreachable2, relayInfo)
-	assert.Nil(t, err)
-	if reserve.Expiration.Before(time.Now()) {
-		client.Reserve(ctx, unreachable2, relayInfo)
-	}
+	go ReserveRelaySlot(ctx, unreachable2, relayInfo, time.Millisecond*100)
+	time.Sleep(time.Second)
 	relayaddr, err := MakeRelayAddrs(relayInfo.ID.String(), unreachable2.ID().String())
 	assert.Nil(t, err)
 	t.Log("relayaddr:", relayaddr)
diff --git a/system/p2p/dht/p2p.go b/system/p2p/dht/p2p.go
index 3256a20b8..485a8a2f6 100644
--- a/system/p2p/dht/p2p.go
+++ b/system/p2p/dht/p2p.go
@@ -230,14 +230,12 @@ func (p *P2P) CloseP2P() {
 }
 
 func (p *P2P) reStart() {
-	atomic.StoreInt32(&p.restart, 1)
-	log.Info("reStart p2p")
+
 	if p.host == nil {
-		//说明p2p还没有开始启动，无需重启
-		log.Info("p2p no need restart...")
-		atomic.StoreInt32(&p.restart, 0)
 		return
 	}
+	atomic.StoreInt32(&p.restart, 1)
+	log.Info("reStart p2p")
 	p.CloseP2P()
 	p.StartP2P()
 }
diff --git a/system/p2p/dht/p2p_test.go b/system/p2p/dht/p2p_test.go
index 39123ef71..6a48959b2 100644
--- a/system/p2p/dht/p2p_test.go
+++ b/system/p2p/dht/p2p_test.go
@@ -428,6 +428,7 @@ func Test_p2p(t *testing.T) {
 	cfg := types.NewChain33Config(types.ReadFile("../../../cmd/chain33/chain33.test.toml"))
 	q := queue.New("channel")
 	datadir := util.ResetDatadir(cfg.GetModuleConfig(), "$TEMP/")
+	setLibp2pLog(cfg.GetModuleConfig().Log.LogFile, "")
 	cfg.GetModuleConfig().Log.LogFile = ""
 	cfg.GetModuleConfig().Address.DefaultDriver = "BTC"
 	q.SetConfig(cfg)
@@ -469,5 +470,6 @@ func Test_p2p(t *testing.T) {
 	tcfg.DbCache = 4
 	tcfg.DbPath = filepath.Join(datadir, "addrbook")
 	testAddrbook(t, &tcfg)
+	dhtp2p.reStart()
 	p2p.CloseP2P()
 }