diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index fd61935aea..5ec40d42b5 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -1378,7 +1378,9 @@ static int32_t doMergeBufAndFileRows(STsdbReader* pReader, STableBlockScanInfo*
 static int32_t doMergeFileBlockAndLastBlock(SLastBlockReader* pLastBlockReader, STsdbReader* pReader,
                                             STableBlockScanInfo* pBlockScanInfo, SBlockData* pBlockData,
                                             bool mergeBlockData) {
-  int64_t tsLastBlock = getCurrentKeyInLastBlock(pLastBlockReader);
+  SFileBlockDumpInfo* pDumpInfo = &pReader->status.fBlockDumpInfo;
+  SBlockData* pLastBlockData = &pLastBlockReader->lastBlockData;
+  int64_t     tsLastBlock = getCurrentKeyInLastBlock(pLastBlockReader);
 
   STSRow*    pTSRow = NULL;
   SRowMerger merge = {0};
@@ -1388,7 +1390,7 @@ static int32_t doMergeFileBlockAndLastBlock(SLastBlockReader* pLastBlockReader,
   doMergeRowsInLastBlock(pLastBlockReader, pBlockScanInfo, tsLastBlock, &merge);
 
   // merge with block data if ts == key
-  if (mergeBlockData) {
+  if (mergeBlockData && (tsLastBlock == pBlockData->aTSKEY[pDumpInfo->rowIndex])) {
     doMergeRowsInFileBlocks(pBlockData, pBlockScanInfo, pReader, &merge);
   }