diff --git a/p2p/host/hostv1/hostv1.go b/p2p/host/hostv1/hostv1.go
deleted file mode 100644
index 400134fe6..000000000
--- a/p2p/host/hostv1/hostv1.go
+++ /dev/null
@@ -1,119 +0,0 @@
-package hostv1
-
-import (
-	"fmt"
-	"io"
-	"net"
-	"time"
-
-	"github.com/ethereum/go-ethereum/log"
-	"github.com/harmony-one/harmony/p2p"
-	p2p_host "github.com/libp2p/go-libp2p-host"
-	peer "github.com/libp2p/go-libp2p-peer"
-)
-
-// HostV1 is the version 1 p2p host, using direct socket call.
-type HostV1 struct {
-	self     p2p.Peer
-	listener net.Listener
-	quit     chan struct{}
-}
-
-// AddPeer do nothing
-func (host *HostV1) AddPeer(p *p2p.Peer) error {
-	return nil
-}
-
-// New creates a HostV1
-func New(self *p2p.Peer) *HostV1 {
-	h := &HostV1{
-		self: *self,
-		quit: make(chan struct{}, 1),
-	}
-	return h
-}
-
-// GetSelfPeer gets self peer
-func (host *HostV1) GetSelfPeer() p2p.Peer {
-	return host.self
-}
-
-// GetID return ID
-func (host *HostV1) GetID() peer.ID {
-	return peer.ID(fmt.Sprintf("%s:%s", host.self.IP, host.self.Port))
-}
-
-// BindHandlerAndServe Version 0 p2p. Going to be deprecated.
-func (host *HostV1) BindHandlerAndServe(handler p2p.StreamHandler) {
-	port := host.self.Port
-	addr := net.JoinHostPort("", port)
-	var err error
-	host.listener, err = net.Listen("tcp4", addr)
-	if err != nil {
-		log.Error("Socket listen port failed", "addr", addr, "err", err)
-		return
-	}
-	if host.listener == nil {
-		log.Error("Listen returned nil", "addr", addr)
-		return
-	}
-	backoff := p2p.NewExpBackoff(250*time.Millisecond, 15*time.Second, 2.0)
-	for { // Keep listening
-		conn, err := host.listener.Accept()
-		select {
-		case <-host.quit:
-			// If we've already received quit signal, simply ignore the error and return
-			log.Info("Quit host", "addr", net.JoinHostPort(host.self.IP, host.self.Port))
-			return
-		default:
-			{
-				if err != nil {
-					log.Error("Error listening on port.", "port", port,
-						"err", err)
-					backoff.Sleep()
-					continue
-				}
-				// log.Debug("Received New connection", "local", conn.LocalAddr(), "remote", conn.RemoteAddr())
-				go handler(conn)
-			}
-		}
-	}
-}
-
-// SendMessage sends message to peer
-func (host *HostV1) SendMessage(peer p2p.Peer, message []byte) error {
-	logger := log.New("from", host.self, "to", peer, "PeerID", peer.PeerID)
-	addr := net.JoinHostPort(peer.IP, peer.Port)
-	conn, err := net.Dial("tcp", addr)
-	if err != nil {
-		logger.Warn("Dial() failed", "address", addr, "error", err)
-		return fmt.Errorf("Dial(%s) failed: %v", addr, err)
-	}
-	defer func() {
-		if err := conn.Close(); err != nil {
-			logger.Warn("Close() failed", "error", err)
-		}
-	}()
-
-	if nw, err := conn.Write(message); err != nil {
-		logger.Warn("Write() failed", "error", err)
-		return fmt.Errorf("Write() failed: %v", err)
-	} else if nw < len(message) {
-		logger.Warn("Short Write()", "actual", nw, "expected", len(message))
-		return io.ErrShortWrite
-	}
-
-	// No ack (reply) message from the receiver for now.
-	return nil
-}
-
-// Close closes the host
-func (host *HostV1) Close() error {
-	host.quit <- struct{}{}
-	return host.listener.Close()
-}
-
-// GetP2PHost returns nothing
-func (host *HostV1) GetP2PHost() p2p_host.Host {
-	return nil
-}
diff --git a/p2p/p2pimpl/p2pimpl.go b/p2p/p2pimpl/p2pimpl.go
index 1cdcf7102..c78de3a6f 100644
--- a/p2p/p2pimpl/p2pimpl.go
+++ b/p2p/p2pimpl/p2pimpl.go
@@ -4,7 +4,6 @@ import (
 	"net"
 
 	"github.com/harmony-one/harmony/p2p"
-	"github.com/harmony-one/harmony/p2p/host/hostv1"
 	"github.com/harmony-one/harmony/p2p/host/hostv2"
 
 	"github.com/harmony-one/harmony/internal/utils"
@@ -12,20 +11,10 @@ import (
 	p2p_config "github.com/libp2p/go-libp2p/config"
 )
 
-// Version The version number of p2p library
-// 1 - Direct socket connection
-// 2 - libp2p
-const Version = 2
-
 // NewHost starts the host for p2p
 // for hostv2, it generates multiaddress, keypair and add PeerID to peer, add priKey to host
 // TODO (leo) The peerstore has to be persisted on disk.
 func NewHost(self *p2p.Peer, key p2p_crypto.PrivKey, opts ...p2p_config.Option) (p2p.Host, error) {
-	if Version == 1 {
-		h := hostv1.New(self)
-		return h, nil
-	}
-
 	h := hostv2.New(self, key, opts...)
 
 	utils.GetLogInstance().Info("NewHost", "self", net.JoinHostPort(self.IP, self.Port), "PeerID", self.PeerID)