diff --git a/blockchain/blockchain.go b/blockchain/blockchain.go
index 7bba0c46b..f23e64b15 100644
--- a/blockchain/blockchain.go
+++ b/blockchain/blockchain.go
@@ -1409,6 +1409,8 @@ func (b *BlockChain) reorganizeChain(detachNodes, attachNodes *list.List) error
 
 	// recover check point from genesis block
 	if recoverFromDefault {
+		//reset all mem state data
+		b.CkpManager.OnReset()
 		b.InitCheckpoint(nil, nil, nil)
 	}
 
@@ -1731,6 +1733,7 @@ func (b *BlockChain) connectBestChain(node *BlockNode, block *Block, confirm *pa
 	// for future processing, so add the block to the side chain holding
 	// cache.
 	log.Debugf("Adding block %x to side chain cache", node.Hash.Bytes())
+
 	b.blockCache[*node.Hash] = block
 	b.confirmCache[*node.Hash] = confirm
 	//b.Index[*node.Hash] = node
@@ -2045,7 +2048,6 @@ func (b *BlockChain) BlockLocatorFromHash(inhash *Uint256) []*Uint256 {
 
 		// The desired block height is in the main chain, so look it up
 		// from the main chain database.
-
 		h, err := b.GetBlockHash(uint32(blockHeight))
 		if err != nil {
 			log.Debugf("Lookup of known valid height failed %v", blockHeight)
diff --git a/blockchain/indexers/checkpoint.go b/blockchain/indexers/checkpoint.go
index 10af8cfde..28a3037ae 100644
--- a/blockchain/indexers/checkpoint.go
+++ b/blockchain/indexers/checkpoint.go
@@ -41,6 +41,10 @@ func (c *Checkpoint) OnRollbackTo(height uint32) error {
 	return nil
 }
 
+func (c *Checkpoint) OnReset() error {
+	return nil
+}
+
 func (c *Checkpoint) OnRollbackSeekTo(height uint32) {
 	return
 }
diff --git a/core/checkpoint/manager.go b/core/checkpoint/manager.go
index 4facf3146..b25c5d111 100644
--- a/core/checkpoint/manager.go
+++ b/core/checkpoint/manager.go
@@ -110,6 +110,9 @@ type ICheckPoint interface {
 
 	// GetHeight returns initial height checkpoint should start with.
 	StartHeight() uint32
+
+	//reset
+	OnReset() error
 }
 
 // Manager holds checkpoints save automatically.
@@ -200,6 +203,20 @@ func (m *Manager) GetCheckpoint(key string, height uint32) (
 	}
 }
 
+func (m *Manager) OnReset() error {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+
+	sortedPoints := m.getOrderedCheckpoints()
+	for i, v := range sortedPoints {
+		err := v.OnReset()
+		if err != nil {
+			log.Error(" Reset ", err, " i", i)
+		}
+	}
+	return nil
+}
+
 // Restore will load all data of each checkpoints file and store in
 // corresponding meta-data.
 func (m *Manager) Restore() (err error) {
diff --git a/core/checkpoint/manager_test.go b/core/checkpoint/manager_test.go
index 7fe614705..3d52b634b 100644
--- a/core/checkpoint/manager_test.go
+++ b/core/checkpoint/manager_test.go
@@ -135,6 +135,10 @@ func (c *checkpoint) OnRollbackSeekTo(height uint32) {
 	return
 }
 
+func (c *checkpoint) OnReset() error {
+	return nil
+}
+
 func TestManager_SaveAndRestore(t *testing.T) {
 	data := uint64(1)
 	currentHeight := uint32(10)
diff --git a/cr/state/checkpoint.go b/cr/state/checkpoint.go
index a62a919c5..7d2829e0b 100644
--- a/cr/state/checkpoint.go
+++ b/cr/state/checkpoint.go
@@ -46,6 +46,27 @@ func (c *Checkpoint) OnBlockSaved(block *types.DposBlock) {
 	c.committee.ProcessBlock(block.Block, block.Confirm)
 }
 
+func (c *Checkpoint) OnReset() error {
+	log.Info("cr state OnReset")
+	keyFrame := NewKeyFrame()
+
+	committee := &Committee{
+		state:                NewState(c.committee.Params),
+		Params:               c.committee.Params,
+		KeyFrame:             *keyFrame,
+		firstHistory:         utils.NewHistory(maxHistoryCapacity),
+		inactiveCRHistory:    utils.NewHistory(maxHistoryCapacity),
+		committeeHistory:     utils.NewHistory(maxHistoryCapacity),
+		appropriationHistory: utils.NewHistory(maxHistoryCapacity),
+	}
+	c.initFromCommittee(committee)
+	c.committee.Recover(c)
+	c.committee.state.RegisterFunctions(&FunctionsConfig{
+		GetHistoryMember: committee.getHistoryMember,
+	})
+	return nil
+}
+
 func (c *Checkpoint) OnRollbackTo(height uint32) error {
 	keyFrame := NewKeyFrame()
 	if height < c.StartHeight() {
diff --git a/cr/state/committee.go b/cr/state/committee.go
index 7ca7b5fc0..bfa7b7d43 100644
--- a/cr/state/committee.go
+++ b/cr/state/committee.go
@@ -1185,6 +1185,7 @@ func (c *Committee) getSignersFromWithdrawFromSideChainTx(tx interfaces.Transact
 	publicKeys := make([]string, 0)
 	if tx.PayloadVersion() == payload.WithdrawFromSideChainVersionV2 {
 		allPulicKeys := c.getCurrentArbiters()
+
 		pld := tx.Payload().(*payload.WithdrawFromSideChain)
 		for _, index := range pld.Signers {
 			publicKeys = append(publicKeys, hex.EncodeToString(allPulicKeys[index]))
diff --git a/dpos/state/arbitrators.go b/dpos/state/arbitrators.go
index 878967807..9d18359a9 100644
--- a/dpos/state/arbitrators.go
+++ b/dpos/state/arbitrators.go
@@ -285,7 +285,6 @@ func (a *Arbiters) CheckNextTurnDPOSInfoTx(block *types.Block) error {
 	if needNextTurnDposInfo {
 		needNextTurnDPOSInfoCount = 1
 	}
-
 	if nextTurnDPOSInfoTxCount != needNextTurnDPOSInfoCount {
 		return fmt.Errorf("current block height %d, NextTurnDPOSInfo "+
 			"transaction count should be %d, current block contains %d",
diff --git a/dpos/state/checkpoint.go b/dpos/state/checkpoint.go
index 1979c0cf7..6a520c310 100644
--- a/dpos/state/checkpoint.go
+++ b/dpos/state/checkpoint.go
@@ -78,6 +78,20 @@ func (c *CheckPoint) OnRollbackSeekTo(height uint32) {
 	c.arbitrators.RollbackSeekTo(height)
 }
 
+func (c *CheckPoint) OnReset() error {
+	log.Info("dpos state OnReset")
+	ar := &Arbiters{}
+	ar.State = &State{
+		StateKeyFrame: NewStateKeyFrame(),
+	}
+	if err := ar.initArbitrators(c.arbitrators.ChainParams); err != nil {
+		return err
+	}
+	c.initFromArbitrators(ar)
+	c.arbitrators.RecoverFromCheckPoints(c)
+	return nil
+}
+
 func (c *CheckPoint) OnRollbackTo(height uint32) error {
 	if height < c.StartHeight() {
 		ar := &Arbiters{}
diff --git a/elanet/netsync/manager.go b/elanet/netsync/manager.go
index bae07a6b1..58699b46e 100644
--- a/elanet/netsync/manager.go
+++ b/elanet/netsync/manager.go
@@ -437,6 +437,7 @@ func (sm *SyncManager) handleBlockMsg(bmsg *blockMsg) {
 
 	log.Debug("sm.chain.BestChain.Height:", sm.chain.BestChain.Height,
 		"sm.syncHeight:", sm.syncHeight, "isOrphan:", isOrphan)
+
 	// Request the parents for the orphan block from the peer that sent it.
 	if isOrphan {
 		orphanRoot := sm.chain.GetOrphanRoot(&blockHash)
@@ -567,9 +568,7 @@ func (sm *SyncManager) handleInvMsg(imsg *invMsg) {
 			// Add it to the request queue.
 			state.requestQueue = append(state.requestQueue, iv)
 			continue
-		}
-
-		if iv.Type == msg.InvTypeConfirmedBlock {
+		} else if iv.Type == msg.InvTypeConfirmedBlock {
 			// The block is an orphan block that we already have.
 			// When the existing orphan was processed, it requested
 			// the missing parent blocks.  When this scenario
@@ -605,7 +604,6 @@ func (sm *SyncManager) handleInvMsg(imsg *invMsg) {
 			}
 		}
 	}
-
 	// Request as much as possible at once.  Anything that won't fit into
 	// the request will be requested on the next inv message.
 	numRequested := 0
@@ -659,7 +657,7 @@ func (sm *SyncManager) handleInvMsg(imsg *invMsg) {
 	}
 
 	// maxBlockLocators = 500
-	if len(gdmsg.InvList) == 500 {
+	if len(invVects) == 500 {
 		locator := sm.chain.GetOrphanBlockLocator(invVects)
 		log.Info("PushGetBlocksMsg 2:", locator, "count:", len(gdmsg.InvList))
 		if err := peer.PushGetBlocksMsg(locator, &zeroHash); err != nil {
diff --git a/mempool/txpoolcheckpoint.go b/mempool/txpoolcheckpoint.go
index 868fb136c..10e7b9717 100644
--- a/mempool/txpoolcheckpoint.go
+++ b/mempool/txpoolcheckpoint.go
@@ -76,6 +76,10 @@ func (c *txPoolCheckpoint) GetHeight() uint32 {
 	return c.height
 }
 
+func (c *txPoolCheckpoint) OnReset() error {
+	return nil
+}
+
 func (c *txPoolCheckpoint) SetHeight(height uint32) {
 	c.height = height
 }
diff --git a/wallet/coincheckpoint.go b/wallet/coincheckpoint.go
index e328d4e74..f09565362 100644
--- a/wallet/coincheckpoint.go
+++ b/wallet/coincheckpoint.go
@@ -127,6 +127,10 @@ func (ccp *CoinsCheckPoint) Generator() func(buf []byte) checkpoint.ICheckPoint
 	}
 }
 
+func (ccp *CoinsCheckPoint) OnReset() error {
+	return nil
+}
+
 func (ccp *CoinsCheckPoint) LogError(err error) {
 	log.Warn(err.Error())
 }