diff --git a/blockchain/pool.go b/blockchain/pool.go
index 993ce73ef61..8f4f522eac0 100644
--- a/blockchain/pool.go
+++ b/blockchain/pool.go
@@ -66,6 +66,7 @@ type BlockPool struct {
 	mtx sync.Mutex
 	// block requests
 	requesters map[int64]*bpRequester
+	initHeight int64
 	height     int64 // the lowest key in requesters.
 	// peers
 	peers         map[p2p.ID]*bpPeer
@@ -83,6 +84,7 @@ func NewBlockPool(start int64, requestsCh chan<- BlockRequest, errorsCh chan<- p
 		peers: make(map[p2p.ID]*bpPeer),
 
 		requesters: make(map[int64]*bpRequester),
+		initHeight: start,
 		height:     start,
 		numPending: 0,
 
diff --git a/blockchain/reactor.go b/blockchain/reactor.go
index 714c3322358..3abb747945d 100644
--- a/blockchain/reactor.go
+++ b/blockchain/reactor.go
@@ -286,7 +286,7 @@ FOR_LOOP:
 			// numPending=0 total=0 outbound=1 inbound=0 height=6601 blocksSynced=0 poolHeight=6601 poolstarttime=2019-02-22T09:02:07.881888662Z poolMaxPeerHeight=6437 poolHeight=6601
 			// we need make sure blockstore has a block because when switch to consensus, it will verify the commit between block and state
 			// refer to `cs.blockStore.LoadSeenCommit(state.LastBlockHeight)`
-			if bcR.pool.IsCaughtUp() && (height == 1 || blocksSynced > 0) {
+			if bcR.pool.IsCaughtUp() && (height == bcR.pool.initHeight || blocksSynced > 0) {
 				bcR.Logger.Info("Time to switch to consensus reactor!", "height", height)
 				bcR.pool.Stop()