diff --git a/app/config/config.go b/app/config/config.go
index 25a366c942..67f069b012 100644
--- a/app/config/config.go
+++ b/app/config/config.go
@@ -135,6 +135,8 @@ type OecConfig struct {
 	enableMempoolSimGuFactor bool
 
 	maxSubscriptionClients int
+
+	maxTxLimitPerPeer uint64
 }
 
 const (
@@ -178,6 +180,7 @@ const (
 	FlagCommitGapOffset            = "commit-gap-offset"
 	FlagEnableMempoolSimGuFactor   = "enable-mem-sim-gu-factor"
 	FlagMaxSubscriptionClients     = "max-subscription-clients"
+	FlagMaxTxLimitPerPeer          = "mempool.max_tx_limit_per_peer"
 )
 
 var (
@@ -297,6 +300,7 @@ func (c *OecConfig) loadFromConfig() {
 	c.SetMempoolFlush(viper.GetBool(FlagMempoolFlush))
 	c.SetMempoolCheckTxCost(viper.GetBool(FlagMempoolCheckTxCost))
 	c.SetMaxTxNumPerBlock(viper.GetInt64(FlagMaxTxNumPerBlock))
+	c.SetMaxTxLimitPerPeer(int64(viper.GetUint64(FlagMaxTxLimitPerPeer)))
 	c.SetEnableDeleteMinGPTx(viper.GetBool(FlagMempoolEnableDeleteMinGPTx))
 	c.SetPendingPoolBlacklist(viper.GetString(FlagPendingPoolBlacklist))
 	c.SetMaxGasUsedPerBlock(viper.GetInt64(FlagMaxGasUsedPerBlock))
@@ -491,6 +495,12 @@ func (c *OecConfig) updateFromKVStr(k, v string) {
 			return
 		}
 		c.SetMaxTxNumPerBlock(r)
+	case FlagMaxTxLimitPerPeer:
+		r, err := strconv.ParseInt(v, 10, 64)
+		if err != nil {
+			return
+		}
+		c.SetMaxTxLimitPerPeer(r)
 	case FlagMempoolEnableDeleteMinGPTx:
 		r, err := strconv.ParseBool(v)
 		if err != nil {
@@ -1196,3 +1206,14 @@ func (c *OecConfig) SetPendingPoolBlacklist(v string) {
 func (c *OecConfig) GetPendingPoolBlacklist() string {
 	return c.pendingPoolBlacklist
 }
+
+func (c *OecConfig) SetMaxTxLimitPerPeer(maxTxLimitPerPeer int64) {
+	if maxTxLimitPerPeer < 0 {
+		return
+	}
+	c.maxTxLimitPerPeer = uint64(maxTxLimitPerPeer)
+}
+
+func (c *OecConfig) GetMaxTxLimitPerPeer() uint64 {
+	return c.maxTxLimitPerPeer
+}
diff --git a/dev/testnet/testnet.sh b/dev/testnet/testnet.sh
index d049d9494d..2c28b69c43 100755
--- a/dev/testnet/testnet.sh
+++ b/dev/testnet/testnet.sh
@@ -150,6 +150,7 @@ run() {
     --enable-wtx=${WRAPPEDTX} \
     --mempool.node_key_whitelist ${WHITE_LIST} \
     --p2p.pex=false \
+    --mempool.max_tx_limit_per_peer=1 \
     --p2p.addr_book_strict=false \
     $p2p_seed_opt $p2p_seed_arg \
     --p2p.laddr tcp://${IP}:${p2pport} \
@@ -158,7 +159,7 @@ run() {
     --chain-id ${CHAIN_ID} \
     --upload-delta=false \
     --enable-gid \
-    --consensus.timeout_commit 3800ms \
+    --consensus.timeout_commit 10000ms \
     --enable-blockpart-ack=false \
     --append-pid=true \
     ${LOG_SERVER} \
diff --git a/libs/tendermint/cmd/tendermint/commands/run_node.go b/libs/tendermint/cmd/tendermint/commands/run_node.go
index a576e84763..e3194d1b99 100644
--- a/libs/tendermint/cmd/tendermint/commands/run_node.go
+++ b/libs/tendermint/cmd/tendermint/commands/run_node.go
@@ -195,6 +195,11 @@ func AddNodeFlags(cmd *cobra.Command) {
 		config.Mempool.PendingRemoveEvent,
 		"Push event when remove a pending tx",
 	)
+	cmd.Flags().Uint64(
+		"mempool.max_tx_limit_per_peer",
+		config.Mempool.MaxTxLimitPerPeer,
+		"Max tx limit per peer. If set 0 ,this flag disable",
+	)
 
 	cmd.Flags().String(
 		"mempool.node_key_whitelist",
diff --git a/libs/tendermint/config/config.go b/libs/tendermint/config/config.go
index ae3f587780..b5559335b3 100644
--- a/libs/tendermint/config/config.go
+++ b/libs/tendermint/config/config.go
@@ -689,6 +689,7 @@ type MempoolConfig struct {
 	PendingPoolMaxTxPerAddress int      `mapstructure:"pending_pool_max_tx_per_address"`
 	NodeKeyWhitelist           []string `mapstructure:"node_key_whitelist"`
 	PendingRemoveEvent         bool     `mapstructure:"pending_remove_event"`
+	MaxTxLimitPerPeer          uint64   `mapstructure:"max_tx_limit_per_peer"`
 }
 
 // DefaultMempoolConfig returns a default configuration for the Tendermint mempool
@@ -715,6 +716,7 @@ func DefaultMempoolConfig() *MempoolConfig {
 		PendingPoolMaxTxPerAddress: 100,
 		NodeKeyWhitelist:           []string{},
 		PendingRemoveEvent:         false,
+		MaxTxLimitPerPeer:          100,
 	}
 }
 
@@ -953,12 +955,14 @@ func (cfg *ConsensusConfig) ValidateBasic() error {
 	return nil
 }
 
-//-----------------------------------------------------------------------------
+// -----------------------------------------------------------------------------
 // TxIndexConfig
 // Remember that Event has the following structure:
 // type: [
-//  key: value,
-//  ...
+//
+//	key: value,
+//	...
+//
 // ]
 //
 // CompositeKeys are constructed by `type.key`
diff --git a/libs/tendermint/config/dynamic_config_okchain.go b/libs/tendermint/config/dynamic_config_okchain.go
index a7ae0d9da7..d990f8b012 100644
--- a/libs/tendermint/config/dynamic_config_okchain.go
+++ b/libs/tendermint/config/dynamic_config_okchain.go
@@ -40,6 +40,7 @@ type IDynamicConfig interface {
 	GetEnableMempoolSimGuFactor() bool
 	GetMaxSubscriptionClients() int
 	GetPendingPoolBlacklist() string
+	GetMaxTxLimitPerPeer() uint64
 }
 
 var DynamicConfig IDynamicConfig = MockDynamicConfig{}
@@ -228,3 +229,7 @@ func (d *MockDynamicConfig) SetMaxSubscriptionClients(value int) {
 func (d MockDynamicConfig) GetPendingPoolBlacklist() string {
 	return ""
 }
+
+func (c MockDynamicConfig) GetMaxTxLimitPerPeer() uint64 {
+	return DefaultMempoolConfig().MaxTxLimitPerPeer
+}
diff --git a/libs/tendermint/mempool/clist_mempool.go b/libs/tendermint/mempool/clist_mempool.go
index 291928ef75..d8108c0a4c 100644
--- a/libs/tendermint/mempool/clist_mempool.go
+++ b/libs/tendermint/mempool/clist_mempool.go
@@ -104,6 +104,9 @@ type CListMempool struct {
 
 	gpo *Oracle
 
+	peersTxCountMtx sync.RWMutex
+	peersTxCount    map[string]uint64
+
 	info pguInfo
 }
 
@@ -152,6 +155,7 @@ func NewCListMempool(
 		txs:           txQueue,
 		simQueue:      make(chan *mempoolTx, 200000),
 		gpo:           gpo,
+		peersTxCount:  make(map[string]uint64, 0),
 	}
 
 	if config.PendingRemoveEvent {
@@ -286,6 +290,38 @@ func (mem *CListMempool) TxsWaitChan() <-chan struct{} {
 	return mem.txs.TxsWaitChan()
 }
 
+func (mem *CListMempool) validatePeerCount(txInfo TxInfo) error {
+	if cfg.DynamicConfig.GetMaxTxLimitPerPeer() == 0 {
+		return nil
+	}
+	mem.peersTxCountMtx.Lock()
+	defer mem.peersTxCountMtx.Unlock()
+	if len(txInfo.SenderP2PID) != 0 {
+		peerTxCount, ok := mem.peersTxCount[string(txInfo.SenderP2PID)]
+		if !ok {
+			peerTxCount = 0
+		}
+		if peerTxCount >= cfg.DynamicConfig.GetMaxTxLimitPerPeer() {
+			mem.logger.Debug(fmt.Sprintf("%s has been over %d transaction, please wait a few second", txInfo.SenderP2PID, cfg.DynamicConfig.GetMaxTxLimitPerPeer()))
+			return fmt.Errorf("%s has been over %d transaction, please wait a few second", txInfo.SenderP2PID, cfg.DynamicConfig.GetMaxTxLimitPerPeer())
+		}
+		peerTxCount++
+		mem.peersTxCount[string(txInfo.SenderP2PID)] = peerTxCount
+	}
+	return nil
+}
+
+func (mem *CListMempool) resetPeerCount() {
+	if cfg.DynamicConfig.GetMaxTxLimitPerPeer() == 0 {
+		return
+	}
+	mem.peersTxCountMtx.Lock()
+	defer mem.peersTxCountMtx.Unlock()
+	for key := range mem.peersTxCount {
+		delete(mem.peersTxCount, key)
+	}
+}
+
 // It blocks if we're waiting on Update() or Reap().
 // cb: A callback from the CheckTx command.
 //
@@ -295,6 +331,9 @@ func (mem *CListMempool) TxsWaitChan() <-chan struct{} {
 //
 // Safe for concurrent use by multiple goroutines.
 func (mem *CListMempool) CheckTx(tx types.Tx, cb func(*abci.Response), txInfo TxInfo) error {
+	if err := mem.validatePeerCount(txInfo); err != nil {
+		return err
+	}
 	timeStart := int64(0)
 	if cfg.DynamicConfig.GetMempoolCheckTxCost() {
 		timeStart = time.Now().UnixMicro()
@@ -993,6 +1032,7 @@ func (mem *CListMempool) Update(
 	preCheck PreCheckFunc,
 	postCheck PostCheckFunc,
 ) error {
+	mem.resetPeerCount()
 	// no need to update when mempool is unavailable
 	if mem.config.Sealed {
 		return mem.updateSealed(height, txs, deliverTxResponses)