diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d36264fde..b8da07261a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 * [#1648](https://github.com/crypto-org-chain/cronos/pull/1648) Add abort OE in PrepareProposal.
 * (testground)[#1651](https://github.com/crypto-org-chain/cronos/pull/1651) Benchmark use cosmos broadcast rpc.
 * (testground)[#1650](https://github.com/crypto-org-chain/cronos/pull/1650) Benchmark support batch mode.
+* [#1658](https://github.com/crypto-org-chain/cronos/pull/1658) Optimize when block-list is empty.
 
 *Oct 14, 2024*
 
diff --git a/app/proposal.go b/app/proposal.go
index 8a755941c5..3e4465b084 100644
--- a/app/proposal.go
+++ b/app/proposal.go
@@ -124,6 +124,11 @@ func (h *ProposalHandler) SetBlockList(blob []byte) error {
 }
 
 func (h *ProposalHandler) ValidateTransaction(tx sdk.Tx) error {
+	if len(h.blocklist) == 0 {
+		// fast path, accept all txs
+		return nil
+	}
+
 	sigTx, ok := tx.(signing.SigVerifiableTx)
 	if !ok {
 		return fmt.Errorf("tx of type %T does not implement SigVerifiableTx", tx)
@@ -147,6 +152,11 @@ func (h *ProposalHandler) ValidateTransaction(tx sdk.Tx) error {
 
 func (h *ProposalHandler) ProcessProposalHandler() sdk.ProcessProposalHandler {
 	return func(ctx sdk.Context, req *abci.RequestProcessProposal) (*abci.ResponseProcessProposal, error) {
+		if len(h.blocklist) == 0 {
+			// fast path, accept all txs
+			return &abci.ResponseProcessProposal{Status: abci.ResponseProcessProposal_ACCEPT}, nil
+		}
+
 		for _, txBz := range req.Txs {
 			memTx, err := h.TxDecoder(txBz)
 			if err != nil {