diff --git a/bcos-pbft/bcos-pbft/pbft/engine/Validator.h b/bcos-pbft/bcos-pbft/pbft/engine/Validator.h
index 59cfb7a529..fd7ec627ee 100644
--- a/bcos-pbft/bcos-pbft/pbft/engine/Validator.h
+++ b/bcos-pbft/bcos-pbft/pbft/engine/Validator.h
@@ -93,6 +93,17 @@ class TxsValidator : public ValidatorInterface, public std::enable_shared_from_t
     void verifyProposal(bcos::crypto::PublicPtr _fromNode, PBFTProposalInterface::Ptr _proposal,
         std::function<void(Error::Ptr, bool)> _verifyFinishedHandler) override
     {
+        auto block = m_blockFactory->createBlock(_data);
+        auto blockHeader = block->blockHeader();
+        if (blockHeader->number() != _proposal->index())
+        {
+            if (_verifyFinishedHandler)
+            {
+                auto error = std::make_shared<Error>(-1, "Invalid proposal");
+                _verifyFinishedHandler(error, false);
+            }
+            return;
+        }
         m_txPool->asyncVerifyBlock(_fromNode, _proposal->data(), _verifyFinishedHandler);
     }