diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index f51d0d2fd68460738e4e6e2e4e147a77d378e134..3a54bd61273e299ee8f9c2783818c55300114545 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -707,7 +707,8 @@ typedef struct SSttBlockLoadInfo {
   SArray    *aSttBlk;
   int32_t    blockIndex[2];  // to denote the loaded block in the corresponding position.
   int32_t    currentLoadBlockIndex;
-  LRUHandle *blockDataHandle;
+  SLRUCache* pBlockDataCache;
+  LRUHandle *blockDataHandle[2];
   int32_t    loadBlocks;
   double     elapsedTime;
   STSchema  *pSchema;
@@ -800,6 +801,8 @@ bool    tMergeTreeIgnoreEarlierTs(SMergeTree *pMTree);
 void    tMergeTreeClose(SMergeTree *pMTree);
 
 SSttBlockLoadInfo *tCreateLastBlockLoadInfo(STSchema *pSchema, int16_t *colList, int32_t numOfCols, int32_t numOfStt);
+void               setLastBlockLoadInfoCache(SSttBlockLoadInfo* pLoadInfo, SLRUCache* pBlockDataCache);
+void               releaseLastBlockLoadInfoCacheHandle(SSttBlockLoadInfo *pLoadInfo);
 void               resetLastBlockLoadInfo(SSttBlockLoadInfo *pLoadInfo);
 void               getLastBlockLoadInfo(SSttBlockLoadInfo *pLoadInfo, int64_t *blocks, double *el);
 void              *destroyLastBlockLoadInfo(SSttBlockLoadInfo *pLoadInfo);
diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index f0f34fa9cd98fc95227314ba59f056d57e0420ef..e9b2b4c357a066516c1ee010330e5ee1a66e35a0 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -1214,13 +1214,20 @@ int32_t tsdbOpenCache(STsdb *pTsdb) {
   taosLRUCacheSetStrictCapacity(pTsdb->sttBlockCache, false); 
 
   pTsdb->sttBlkCache = taosLRUCacheInit(4 * 1024 * 1024, -1, 0.0);
+  taosLRUCacheSetStrictCapacity(pTsdb->sttBlkCache, false); 
+
 _err:
   pTsdb->lruCache = pCache;
   return code;
 }
 
 void tsdbCloseCache(STsdb *pTsdb) {
+  taosLRUCacheEraseUnrefEntries(pTsdb->sttBlockCache);
   taosLRUCacheCleanup(pTsdb->sttBlockCache);
+
+  taosLRUCacheEraseUnrefEntries(pTsdb->sttBlkCache);
+  taosLRUCacheCleanup(pTsdb->sttBlkCache);  
+
   SLRUCache *pCache = pTsdb->lruCache;
   if (pCache) {
     taosLRUCacheEraseUnrefEntries(pCache);
diff --git a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
index d9535dc2725914aa723635c21771bd99fae61c06..2e9d2d50480283149deb720a3a2a1ccad1223e60 100644
--- a/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
+++ b/source/dnode/vnode/src/tsdb/tsdbMergeTree.c
@@ -45,11 +45,33 @@ SSttBlockLoadInfo *tCreateLastBlockLoadInfo(STSchema *pSchema, int16_t *colList,
     pLoadInfo[i].pSchema = pSchema;
     pLoadInfo[i].colIds = colList;
     pLoadInfo[i].numOfCols = numOfCols;
+    pLoadInfo[i].blockDataHandle[0] = NULL;
+    pLoadInfo[i].blockDataHandle[1] = NULL;
   }
 
   return pLoadInfo;
 }
 
+void setLastBlockLoadInfoCache(SSttBlockLoadInfo *pLoadInfo, SLRUCache *pBlockDataCache) {
+  for (int32_t i = 0; i < pLoadInfo->numOfStt; ++i) {
+    pLoadInfo[i].pBlockDataCache = pBlockDataCache;
+  }
+}
+
+void releaseLastBlockLoadInfoCacheHandle(SSttBlockLoadInfo *pLoadInfo) {
+  if (pLoadInfo == NULL) return;
+  for (int32_t i = 0; i < pLoadInfo->numOfStt; ++i) {
+    if (pLoadInfo[i].pBlockDataCache && pLoadInfo[i].blockDataHandle[0]) {
+      taosLRUCacheRelease(pLoadInfo[i].pBlockDataCache, pLoadInfo[i].blockDataHandle[0], false);
+      pLoadInfo[i].blockDataHandle[0] = NULL;
+    }
+    if (pLoadInfo[i].pBlockDataCache && pLoadInfo[i].blockDataHandle[1]) {
+      taosLRUCacheRelease(pLoadInfo[i].pBlockDataCache, pLoadInfo[i].blockDataHandle[1], false);
+      pLoadInfo[i].blockDataHandle[1] = NULL;
+    }
+  }
+}
+
 void resetLastBlockLoadInfo(SSttBlockLoadInfo *pLoadInfo) {
   for (int32_t i = 0; i < pLoadInfo->numOfStt; ++i) {
     pLoadInfo[i].currentLoadBlockIndex = 1;
@@ -61,6 +83,8 @@ void resetLastBlockLoadInfo(SSttBlockLoadInfo *pLoadInfo) {
     pLoadInfo[i].elapsedTime = 0;
     pLoadInfo[i].loadBlocks = 0;
     pLoadInfo[i].sttBlockLoaded = false;
+    pLoadInfo[i].blockDataHandle[0] = NULL;
+    pLoadInfo[i].blockDataHandle[1] = NULL;
   }
 }
 
@@ -80,7 +104,14 @@ void *destroyLastBlockLoadInfo(SSttBlockLoadInfo *pLoadInfo) {
     pLoadInfo[i].currentLoadBlockIndex = 1;
     pLoadInfo[i].blockIndex[0] = -1;
     pLoadInfo[i].blockIndex[1] = -1;
-
+    if (pLoadInfo[i].pBlockDataCache && pLoadInfo[i].blockDataHandle[0]) {
+      taosLRUCacheRelease(pLoadInfo[i].pBlockDataCache, pLoadInfo[i].blockDataHandle[0], false);
+      pLoadInfo[i].blockDataHandle[0] = NULL;
+    }
+    if (pLoadInfo[i].pBlockDataCache && pLoadInfo[i].blockDataHandle[1]) {
+      taosLRUCacheRelease(pLoadInfo[i].pBlockDataCache, pLoadInfo[i].blockDataHandle[1], false);
+      pLoadInfo[i].blockDataHandle[1] = NULL;
+    }
     tBlockDataDestroy(&pLoadInfo[i].blockData[0]);
     tBlockDataDestroy(&pLoadInfo[i].blockData[1]);
 
@@ -91,70 +122,23 @@ void *destroyLastBlockLoadInfo(SSttBlockLoadInfo *pLoadInfo) {
   return NULL;
 }
 
-typedef struct SSttBlockDataCacheKey{
-    int32_t fid;
-    int32_t iStt;
-    int64_t cid;
-    int64_t offset;
+typedef struct SSttBlockDataCacheKey {
+  int32_t fid;
+  int32_t iStt;
+  int64_t cid;
+  int64_t offset;
 } SSttBlockDataCacheKey;
 
 static void deleteSttBlockDataCache(const void *key, size_t keyLen, void *value, void *ud) {
-  SBlockData* pBlockData = value;
+  SBlockData *pBlockData = value;
   tBlockDataDestroy(pBlockData);
+  taosMemoryFree(pBlockData);
 }
 
 static SBlockData *loadLastBlock(SLDataIter *pIter, const char *idStr) {
+  int32_t               code = 0;
 
-  // (pReader->pSet->fid, iStt, pReader->pSet->pHeadF->commitID) -> aSttBlk global cache
-
-  // (pIter->pReader->pSet->fid, pIter->iStt, pIter->pReader->pSet->pHeadF->commitID, pIter->pSttBlk->bInfo.offset) -> SBlockData
   SSttBlockLoadInfo *pInfo = pIter->pBlockLoadInfo;
-  if (pIter->pSttBlk == NULL || pInfo->pSchema == NULL) {
-    pInfo->blockDataHandle = NULL;
-    return NULL;
-  }
-  SSttBlockDataCacheKey key = {.fid = pIter->pReader->pSet->fid, .iStt = pIter->iStt, .cid = pIter->pReader->pSet->pHeadF->commitID, .offset = pIter->pSttBlk->bInfo.offset};
-  int32_t code = 0;
-
-  LRUHandle* h = taosLRUCacheLookup(pIter->pReader->pTsdb->sttBlockCache, &key, sizeof(struct SSttBlockDataCacheKey));
-  bool bFound = false;
-  if (!h) {
-    int64_t st = taosGetTimestampUs();
-
-    SSttBlockLoadInfo *pInfo = pIter->pBlockLoadInfo;
-
-    SBlockData* pBlockData = taosMemoryMalloc(sizeof(SBlockData));
-
-    TABLEID id = {0};
-    if (pIter->pSttBlk->suid != 0) {
-      id.suid = pIter->pSttBlk->suid;
-    } else {
-      id.uid = pIter->uid;
-    }
-
-    tBlockDataCreate(pBlockData);
-    tBlockDataInit(pBlockData, &id, pInfo->pSchema, pInfo->colIds, pInfo->numOfCols);
-    tsdbReadSttBlock(pIter->pReader, pIter->iStt, pIter->pSttBlk, pBlockData);
-    double el = (taosGetTimestampUs() - st) / 1000.0;
-
-    tsdbDebug("read last block, total load:%d, trigger by uid:%" PRIu64
-              ", last file index:%d, last block index:%d, entry:%d, rows:%d, %p, elapsed time:%.2f ms, %s",
-              pInfo->loadBlocks, pIter->uid, pIter->iStt, pIter->iSttBlk, pInfo->currentLoadBlockIndex, pBlockData->nRow,
-              pBlockData, el, idStr);
-
-    int charge = 1 * 1024 * 1024; //TODO
-    taosLRUCacheInsert(pIter->pReader->pTsdb->sttBlockCache, &key, sizeof(key), pBlockData, charge, deleteSttBlockDataCache, &h, TAOS_LRU_PRIORITY_LOW, NULL);
-    pInfo->elapsedTime += el;
-    pInfo->loadBlocks += 1;
-  } else {
-    tsdbDebug("use global cached last block, block index:%d, file index:%d, block data offset: %"PRId64 " due to uid:%" PRIu64 ", load data, %s",
-                 pIter->iSttBlk, pIter->iStt, pIter->pSttBlk->bInfo.offset, pIter->uid, idStr);
-    bFound = true;
-  }
-
-  SBlockData* pBlockData = taosLRUCacheValue(pIter->pReader->pTsdb->sttBlockCache, h);
-  pInfo->blockDataHandle = h;
-  return pBlockData;
 
   if (pInfo->blockIndex[0] == pIter->iSttBlk) {
     if (pInfo->currentLoadBlockIndex != 0) {
@@ -162,7 +146,8 @@ static SBlockData *loadLastBlock(SLDataIter *pIter, const char *idStr) {
                 pIter->iSttBlk, pIter->iStt, pIter->uid, idStr);
       pInfo->currentLoadBlockIndex = 0;
     }
-    return &pInfo->blockData[0];
+    SBlockData *pBlockData = taosLRUCacheValue(pInfo->pBlockDataCache, pInfo->blockDataHandle[0]);
+    return pBlockData;
   }
 
   if (pInfo->blockIndex[1] == pIter->iSttBlk) {
@@ -171,7 +156,8 @@ static SBlockData *loadLastBlock(SLDataIter *pIter, const char *idStr) {
                 pIter->iSttBlk, pIter->iStt, pIter->uid, idStr);
       pInfo->currentLoadBlockIndex = 1;
     }
-    return &pInfo->blockData[1];
+    SBlockData *pBlockData = taosLRUCacheValue(pInfo->pBlockDataCache, pInfo->blockDataHandle[1]);
+    return pBlockData;
   }
 
   if (pIter->pSttBlk == NULL || pInfo->pSchema == NULL) {
@@ -182,40 +168,57 @@ static SBlockData *loadLastBlock(SLDataIter *pIter, const char *idStr) {
   pInfo->currentLoadBlockIndex ^= 1;
   int64_t st = taosGetTimestampUs();
 
-  SBlockData *pBlock = &pInfo->blockData[pInfo->currentLoadBlockIndex];
+  SSttBlockDataCacheKey key = {.fid = pIter->pReader->pSet->fid,
+                               .iStt = pIter->iStt,
+                               .cid = pIter->pReader->pSet->pHeadF->commitID,
+                               .offset = pIter->pSttBlk->bInfo.offset};
 
-  TABLEID id = {0};
-  if (pIter->pSttBlk->suid != 0) {
-    id.suid = pIter->pSttBlk->suid;
-  } else {
-    id.uid = pIter->uid;
-  }
+  LRUHandle *h = taosLRUCacheLookup(pInfo->pBlockDataCache, &key, sizeof(struct SSttBlockDataCacheKey));
+  if (!h) {
+    int64_t st = taosGetTimestampUs();
 
-  code = tBlockDataInit(pBlock, &id, pInfo->pSchema, pInfo->colIds, pInfo->numOfCols);
-  if (code != TSDB_CODE_SUCCESS) {
-    goto _exit;
-  }
 
-  code = tsdbReadSttBlock(pIter->pReader, pIter->iStt, pIter->pSttBlk, pBlock);
-  if (code != TSDB_CODE_SUCCESS) {
-    goto _exit;
-  }
+    SBlockData *pBlockData = taosMemoryMalloc(sizeof(SBlockData));
+
+    TABLEID id = {0};
+    if (pIter->pSttBlk->suid != 0) {
+      id.suid = pIter->pSttBlk->suid;
+    } else {
+      id.uid = pIter->uid;
+    }
+
+    tBlockDataCreate(pBlockData);
+    tBlockDataInit(pBlockData, &id, pInfo->pSchema, pInfo->colIds, pInfo->numOfCols);
+    tsdbReadSttBlock(pIter->pReader, pIter->iStt, pIter->pSttBlk, pBlockData);
+    double el = (taosGetTimestampUs() - st) / 1000.0;
 
-  double el = (taosGetTimestampUs() - st) / 1000.0;
-  pInfo->elapsedTime += el;
-  pInfo->loadBlocks += 1;
+    tsdbDebug("read last block, total load:%d, trigger by uid:%" PRIu64
+              ", last file index:%d, block data offset: %" PRId64
+              ", last block index:%d, entry:%d, rows:%d, %p, elapsed time:%.2f ms, %s",
+              pInfo->loadBlocks, pIter->uid, pIter->iStt, pIter->pSttBlk->bInfo.offset, pIter->iSttBlk,
+              pInfo->currentLoadBlockIndex, pBlockData->nRow, pBlockData, el, idStr);
+
+    int charge = 1 * 1024 * 1024;  // TODO
+    taosLRUCacheInsert(pIter->pReader->pTsdb->sttBlockCache, &key, sizeof(key), pBlockData, charge,
+                       deleteSttBlockDataCache, &h, TAOS_LRU_PRIORITY_LOW, NULL);
+    pInfo->elapsedTime += el;
+    pInfo->loadBlocks += 1;
+  } else {
+    tsdbDebug("use global cached last block, block index:%d, file index:%d, block data offset: %" PRId64
+              " due to uid:%" PRIu64 ", load data, %s",
+              pIter->iSttBlk, pIter->iStt, pIter->pSttBlk->bInfo.offset, pIter->uid, idStr);
+  }
 
-  tsdbDebug("read last block, total load:%d, trigger by uid:%" PRIu64
-            ", last file index:%d, last block index:%d, entry:%d, rows:%d, %p, elapsed time:%.2f ms, %s",
-            pInfo->loadBlocks, pIter->uid, pIter->iStt, pIter->iSttBlk, pInfo->currentLoadBlockIndex, pBlock->nRow,
-            pBlock, el, idStr);
+  SBlockData *pBlockData = taosLRUCacheValue(pIter->pReader->pTsdb->sttBlockCache, h);
+  taosLRUCacheRelease(pInfo->pBlockDataCache, pInfo->blockDataHandle[pInfo->currentLoadBlockIndex], false);
+  pInfo->blockDataHandle[pInfo->currentLoadBlockIndex] = h;
 
   pInfo->blockIndex[pInfo->currentLoadBlockIndex] = pIter->iSttBlk;
   pIter->iRow = (pIter->backward) ? pInfo->blockData[pInfo->currentLoadBlockIndex].nRow : -1;
 
   tsdbDebug("last block index list:%d, %d, rowIndex:%d %s", pInfo->blockIndex[0], pInfo->blockIndex[1], pIter->iRow,
             idStr);
-  return &pInfo->blockData[pInfo->currentLoadBlockIndex];
+  return pBlockData;
 
 _exit:
   if (code != TSDB_CODE_SUCCESS) {
@@ -404,7 +407,8 @@ int32_t tLDataIterOpen(struct SLDataIter *pIter, SDataFReader *pReader, int32_t
   return code;
 }
 
-void tLDataIterClose(SLDataIter *pIter) { /*taosMemoryFree(pIter); */}
+void tLDataIterClose(SLDataIter *pIter) { /*taosMemoryFree(pIter); */
+}
 
 void tLDataIterNextBlock(SLDataIter *pIter, const char *idStr) {
   int32_t step = pIter->backward ? -1 : 1;
@@ -468,7 +472,6 @@ static void findNextValidRow(SLDataIter *pIter, const char *idStr) {
 
   bool    hasVal = false;
   int32_t i = pIter->iRow;
-
   SBlockData *pBlockData = loadLastBlock(pIter, idStr);
 
   // mostly we only need to find the start position for a given table
@@ -573,7 +576,6 @@ bool tLDataIterNextRow(SLDataIter *pIter, const char *idStr) {
     }
 
     if (skipBlock || pIter->iRow >= pBlockData->nRow || pIter->iRow < 0) {
-      taosLRUCacheRelease(pIter->pReader->pTsdb->sttBlockCache, pIter->pBlockLoadInfo->blockDataHandle, false);
       tLDataIterNextBlock(pIter, idStr);
       if (pIter->pSttBlk == NULL) {  // no more data
         goto _exit;
@@ -632,7 +634,7 @@ static FORCE_INLINE int32_t tLDataIterDescCmprFn(const SRBTreeNode *p1, const SR
 
 int32_t tMergeTreeOpen(SMergeTree *pMTree, int8_t backward, SDataFReader *pFReader, uint64_t suid, uint64_t uid,
                        STimeWindow *pTimeWindow, SVersionRange *pVerRange, SSttBlockLoadInfo *pBlockLoadInfo,
-                       bool destroyLoadInfo, const char *idStr, bool strictTimeRange, SLDataIter* pLDataIter) {
+                       bool destroyLoadInfo, const char *idStr, bool strictTimeRange, SLDataIter *pLDataIter) {
   int32_t code = TSDB_CODE_SUCCESS;
 
   pMTree->backward = backward;
@@ -641,7 +643,7 @@ int32_t tMergeTreeOpen(SMergeTree *pMTree, int8_t backward, SDataFReader *pFRead
 
   if (!pMTree->backward) {  // asc
     tRBTreeCreate(&pMTree->rbt, tLDataIterCmprFn);
-  } else {  // desc
+  } else {                  // desc
     tRBTreeCreate(&pMTree->rbt, tLDataIterDescCmprFn);
   }
 
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 29e59daeb9fa4ae6510f0117fa6af82cab39d152..5fa8700de219aa9829d780a009cd73e0efda3ed7 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -561,6 +561,7 @@ static int32_t initFilesetIterator(SFilesetIter* pIter, SArray* aDFileSet, STsdb
 
     int32_t numOfStt = pReader->pTsdb->pVnode->config.sttTrigger;
     pLReader->pInfo = tCreateLastBlockLoadInfo(pReader->pSchema, &pInfo->colId[1], pInfo->numOfCols - 1, numOfStt);
+    setLastBlockLoadInfoCache(pLReader->pInfo, pReader->pTsdb->sttBlockCache);
     if (pLReader->pInfo == NULL) {
       tsdbDebug("init fileset iterator failed, code:%s %s", tstrerror(terrno), pReader->idStr);
       return terrno;