diff --git a/source/dnode/vnode/src/inc/tsdb.h b/source/dnode/vnode/src/inc/tsdb.h
index 71f31494fc..9d7cfc0552 100644
--- a/source/dnode/vnode/src/inc/tsdb.h
+++ b/source/dnode/vnode/src/inc/tsdb.h
@@ -117,6 +117,7 @@ int32_t tGetKEYINFO(uint8_t *p, KEYINFO *pKeyInfo);
 // SBlockCol
 int32_t tPutBlockCol(uint8_t *p, void *ph);
 int32_t tGetBlockCol(uint8_t *p, void *ph);
+int32_t tBlockColCmprFn(const void *p1, const void *p2);
 // SBlock
 #define tBlockInit() ((SBlock){0})
 void    tBlockReset(SBlock *pBlock);
@@ -229,7 +230,7 @@ int32_t tsdbDataFReaderClose(SDataFReader **ppReader);
 int32_t tsdbReadBlockIdx(SDataFReader *pReader, SMapData *pMapData, uint8_t **ppBuf);
 int32_t tsdbReadBlock(SDataFReader *pReader, SBlockIdx *pBlockIdx, SMapData *pMapData, uint8_t **ppBuf);
 int32_t tsdbReadColData(SDataFReader *pReader, SBlockIdx *pBlockIdx, SBlock *pBlock, int16_t *aColId, int32_t nCol,
-                        SBlockData *pBlockData);
+                        SBlockData *pBlockData, uint8_t **ppBuf1, uint8_t **ppBuf2);
 int32_t tsdbReadBlockData(SDataFReader *pReader, SBlockIdx *pBlockIdx, SBlock *pBlock, SBlockData *pBlockData,
                           uint8_t **ppBuf1, uint8_t **ppBuf2);
 int32_t tsdbReadBlockSMA(SDataFReader *pReader, SBlockSMA *pBlkSMA);
diff --git a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
index a8a5cb076e..c75d7964a1 100644
--- a/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
+++ b/source/dnode/vnode/src/tsdb/tsdbReaderWriter.c
@@ -618,11 +618,228 @@ _err:
   return code;
 }
 
+static int32_t tsdbRecoverBlockDataKey(SBlockData *pBlockData, SSubBlock *pSubBlock, uint8_t *pBuf, uint8_t **ppBuf) {
+  int32_t code = 0;
+  int64_t size = pSubBlock->vsize + pSubBlock->ksize + sizeof(TSCKSUM);
+  int64_t n;
+
+  if (!taosCheckChecksumWhole(pBuf, size)) {
+    code = TSDB_CODE_FILE_CORRUPTED;
+    goto _err;
+  }
+
+  code = tsdbRealloc((uint8_t **)&pBlockData->aVersion, sizeof(int64_t) * pSubBlock->nRow);
+  if (code) goto _err;
+  code = tsdbRealloc((uint8_t **)&pBlockData->aTSKEY, sizeof(TSKEY) * pSubBlock->nRow);
+  if (code) goto _err;
+
+  if (pSubBlock->cmprAlg == NO_COMPRESSION) {
+    ASSERT(pSubBlock->vsize == sizeof(int64_t) * pSubBlock->nRow);
+    ASSERT(pSubBlock->ksize == sizeof(TSKEY) * pSubBlock->nRow);
+
+    // VERSION
+    memcpy(pBlockData->aVersion, pBuf, pSubBlock->vsize);
+
+    // TSKEY
+    pBuf = pBuf + pSubBlock->vsize;
+    memcpy(pBlockData->aTSKEY, pBuf + pSubBlock->vsize, pSubBlock->ksize);
+  } else {
+    size = sizeof(int64_t) * pSubBlock->nRow + COMP_OVERFLOW_BYTES;
+    if (pSubBlock->cmprAlg == TWO_STAGE_COMP) {
+      code = tsdbRealloc(ppBuf, size);
+      if (code) goto _err;
+    }
+
+    // VERSION
+    n = tsDecompressBigint(pBuf, pSubBlock->vsize, pSubBlock->nRow, (char *)pBlockData->aVersion,
+                           sizeof(int64_t) * pSubBlock->nRow, pSubBlock->cmprAlg, *ppBuf, size);
+    if (n < 0) {
+      code = TSDB_CODE_COMPRESS_ERROR;
+      goto _err;
+    }
+
+    // TSKEY
+    pBuf = pBuf + pSubBlock->vsize;
+    n = tsDecompressTimestamp(pBuf, pSubBlock->ksize, pSubBlock->nRow, (char *)pBlockData->aTSKEY,
+                              sizeof(TSKEY) * pSubBlock->nRow, pSubBlock->cmprAlg, *ppBuf, size);
+    if (n < 0) {
+      code = TSDB_CODE_COMPRESS_ERROR;
+      goto _err;
+    }
+  }
+
+  return code;
+
+_err:
+  return code;
+}
+
+static int32_t tsdbRecoverColData(SBlockData *pBlockData, SSubBlock *pSubBlock, SBlockCol *pBlockCol,
+                                  SColData *pColData, uint8_t *pBuf, uint8_t **ppBuf) {
+  int32_t code = 0;
+  int64_t size;
+  int64_t n;
+
+  ASSERT(pBlockCol->flag != HAS_NULL);
+
+  if (!taosCheckChecksumWhole(pBuf, pBlockCol->bsize + pBlockCol->csize + sizeof(TSCKSUM))) {
+    code = TSDB_CODE_FILE_CORRUPTED;
+    goto _err;
+  }
+
+  pColData->nVal = pSubBlock->nRow;
+  pColData->flag = pBlockCol->flag;
+
+  // bitmap
+  if (pBlockCol->flag != HAS_VALUE) {
+    size = BIT2_SIZE(pSubBlock->nRow);
+    code = tsdbRealloc(&pColData->pBitMap, size);
+    if (code) goto _err;
+
+    ASSERT(pBlockCol->bsize == size);
+
+    memcpy(pColData->pBitMap, pBuf, size);
+  } else {
+    ASSERT(pBlockCol->bsize == 0);
+  }
+  pBuf = pBuf + pBlockCol->bsize;
+
+  // value
+  if (IS_VAR_DATA_TYPE(pBlockCol->type)) {
+    pColData->nData = pBlockCol->osize;
+  } else {
+    pColData->nData = tDataTypes[pBlockCol->type].bytes * pSubBlock->nRow;
+  }
+  code = tsdbRealloc(&pColData->pData, pColData->nData);
+  if (code) goto _err;
+
+  if (pSubBlock->cmprAlg == NO_COMPRESSION) {
+    memcpy(pColData->pData, pBuf, pColData->nData);
+  } else {
+    size = pColData->nData + COMP_OVERFLOW_BYTES;
+    if (pSubBlock->cmprAlg == TWO_STAGE_COMP) {
+      code = tsdbRealloc(ppBuf, size);
+      if (code) goto _err;
+    }
+
+    n = tDataTypes[pBlockCol->type].decompFunc(pBuf, pBlockCol->csize, pSubBlock->nRow, pColData->pData,
+                                               pColData->nData, pSubBlock->cmprAlg, *ppBuf, size);
+    if (n < 0) {
+      code = TSDB_CODE_COMPRESS_ERROR;
+      goto _err;
+    }
+
+    ASSERT(n == pColData->nData);
+  }
+
+  return code;
+
+_err:
+  return code;
+}
+
 int32_t tsdbReadColData(SDataFReader *pReader, SBlockIdx *pBlockIdx, SBlock *pBlock, int16_t *aColId, int32_t nCol,
-                        SBlockData *pBlockData) {
+                        SBlockData *pBlockData, uint8_t **ppBuf1, uint8_t **ppBuf2) {
   int32_t   code = 0;
   TdFilePtr pFD = pBlock->last ? pReader->pLastFD : pReader->pDataFD;
-  // TODO
+  uint8_t  *pBuf1 = NULL;
+  uint8_t  *pBuf2 = NULL;
+
+  ASSERT(nCol == 0 || aColId[0] != PRIMARYKEY_TIMESTAMP_COL_ID);
+
+  if (!ppBuf1) ppBuf1 = &pBuf1;
+  if (!ppBuf2) ppBuf2 = &pBuf2;
+
+  for (int32_t iSubBlock = 0; iSubBlock < pBlock->nSubBlock; iSubBlock++) {
+    SSubBlock *pSubBlock = &pBlock->aSubBlock[iSubBlock];
+    int64_t    offset;
+    int64_t    size;
+    int64_t    n;
+
+    tBlockDataReset(pBlockData);
+    pBlockData->nRow = pSubBlock->nRow;
+
+    // TSDBKEY
+    offset = pSubBlock->offset + sizeof(SBlockDataHdr);
+    size = pSubBlock->vsize + pSubBlock->ksize + sizeof(TSCKSUM);
+    code = tsdbRealloc(ppBuf1, size);
+    if (code) goto _err;
+
+    n = taosLSeekFile(pFD, offset, SEEK_SET);
+    if (n < 0) {
+      code = TAOS_SYSTEM_ERROR(errno);
+      goto _err;
+    }
+
+    n = taosReadFile(pFD, *ppBuf1, size);
+    if (n < 0) {
+      code = TAOS_SYSTEM_ERROR(errno);
+      goto _err;
+    } else if (n < size) {
+      code = TSDB_CODE_FILE_CORRUPTED;
+      goto _err;
+    }
+
+    code = tsdbRecoverBlockDataKey(pBlockData, pSubBlock, *ppBuf1, ppBuf2);
+    if (code) goto _err;
+
+    // OTHER
+    SBlockCol  blockCol;
+    SBlockCol *pBlockCol = &blockCol;
+    SColData  *pColData;
+    for (int32_t iCol = 0; iCol < nCol; iCol++) {
+      int16_t cid = aColId[iCol];
+
+      if (tMapDataSearch(&pSubBlock->mBlockCol, &(SBlockCol){.cid = cid}, tGetBlockCol, tBlockColCmprFn, pBlockCol) ==
+          0) {
+        code = tBlockDataAddColData(pBlockData, taosArrayGetSize(pBlockData->aColDataP), &pColData);
+        if (code) goto _err;
+
+        tColDataReset(pColData, pBlockCol->cid, pBlockCol->type);
+        if (pBlockCol->flag == HAS_NULL) {
+          for (int32_t iRow = 0; iRow < pSubBlock->nRow; iRow++) {
+            code = tColDataAppendValue(pColData, &COL_VAL_NULL(pBlockCol->cid, pBlockCol->type));
+            if (code) goto _err;
+          }
+        } else {
+          offset = pSubBlock->offset + sizeof(SBlockDataHdr) + pSubBlock->vsize + pSubBlock->ksize + pBlockCol->offset;
+          size = pBlockCol->bsize + pBlockCol->csize + sizeof(TSCKSUM);
+
+          code = tsdbRealloc(ppBuf1, size);
+          if (code) goto _err;
+
+          // seek
+          n = taosLSeekFile(pFD, offset, SEEK_SET);
+          if (n < 0) {
+            code = TAOS_SYSTEM_ERROR(errno);
+            goto _err;
+          }
+
+          // read
+          n = taosReadFile(pFD, *ppBuf1, size);
+          if (n < 0) {
+            code = TAOS_SYSTEM_ERROR(errno);
+            goto _err;
+          } else if (n < size) {
+            code = TSDB_CODE_FILE_CORRUPTED;
+            goto _err;
+          }
+
+          code = tsdbRecoverColData(pBlockData, pSubBlock, pBlockCol, pColData, *ppBuf1, ppBuf2);
+          if (code) goto _err;
+        }
+      }
+    }
+  }
+
+  tsdbFree(pBuf1);
+  tsdbFree(pBuf2);
+  return code;
+
+_err:
+  tsdbError("vgId:%d tsdb read col data failed since %s", TD_VID(pReader->pTsdb->pVnode), tstrerror(code));
+  tsdbFree(pBuf1);
+  tsdbFree(pBuf2);
   return code;
 }
 
@@ -691,42 +908,8 @@ static int32_t tsdbReadSubBlockData(SDataFReader *pReader, SBlockIdx *pBlockIdx,
   pBlockData->nRow = pSubBlock->nRow;
   p = *ppBuf1 + sizeof(*pHdr);
 
-  code = tsdbRealloc((uint8_t **)&pBlockData->aVersion, pBlockData->nRow * sizeof(int64_t));
+  code = tsdbRecoverBlockDataKey(pBlockData, pSubBlock, *ppBuf1, ppBuf2);
   if (code) goto _err;
-  code = tsdbRealloc((uint8_t **)&pBlockData->aTSKEY, pBlockData->nRow * sizeof(TSKEY));
-  if (code) goto _err;
-  if (pSubBlock->cmprAlg == NO_COMPRESSION) {
-    ASSERT(pSubBlock->vsize == sizeof(int64_t) * pSubBlock->nRow);
-    ASSERT(pSubBlock->ksize == sizeof(TSKEY) * pSubBlock->nRow);
-
-    // VERSION
-    memcpy(pBlockData->aVersion, p, pSubBlock->vsize);
-
-    // TSKEY
-    memcpy(pBlockData->aTSKEY, p + pSubBlock->vsize, pSubBlock->ksize);
-  } else {
-    size = sizeof(int64_t) * pSubBlock->nRow + COMP_OVERFLOW_BYTES;
-    if (pSubBlock->cmprAlg == TWO_STAGE_COMP) {
-      code = tsdbRealloc(ppBuf2, size);
-      if (code) goto _err;
-    }
-
-    // VERSION
-    n = tsDecompressBigint(p, pSubBlock->vsize, pSubBlock->nRow, (char *)pBlockData->aVersion,
-                           sizeof(int64_t) * pSubBlock->nRow, pSubBlock->cmprAlg, *ppBuf2, size);
-    if (n < 0) {
-      code = TSDB_CODE_COMPRESS_ERROR;
-      goto _err;
-    }
-
-    // TSKEY
-    n = tsDecompressTimestamp(p + pSubBlock->vsize, pSubBlock->ksize, pSubBlock->nRow, (char *)pBlockData->aTSKEY,
-                              sizeof(TSKEY) * pSubBlock->nRow, pSubBlock->cmprAlg, *ppBuf2, size);
-    if (n < 0) {
-      code = TSDB_CODE_COMPRESS_ERROR;
-      goto _err;
-    }
-  }
   p = p + pSubBlock->vsize + pSubBlock->ksize + sizeof(TSCKSUM);
 
   for (int32_t iBlockCol = 0; iBlockCol < pSubBlock->mBlockCol.nItem; iBlockCol++) {
@@ -744,56 +927,14 @@ static int32_t tsdbReadSubBlockData(SDataFReader *pReader, SBlockIdx *pBlockIdx,
         code = tColDataAppendValue(pColData, &COL_VAL_NULL(pBlockCol->cid, pBlockCol->type));
         if (code) goto _err;
       }
-      continue;
-    }
-    pColData->nVal = pSubBlock->nRow;
-    pColData->flag = pBlockCol->flag;
-
-    // bitmap
-    if (pBlockCol->flag != HAS_VALUE) {
-      size = BIT2_SIZE(pSubBlock->nRow);
-      code = tsdbRealloc(&pColData->pBitMap, size);
+    } else {
+      code = tsdbRecoverColData(pBlockData, pSubBlock, pBlockCol, pColData, p, ppBuf2);
       if (code) goto _err;
 
-      ASSERT(pBlockCol->bsize == size);
-
-      memcpy(pColData->pBitMap, p, size);
-    } else {
-      ASSERT(pBlockCol->bsize == 0);
+      p = p + pBlockCol->bsize + pBlockCol->csize + sizeof(TSCKSUM);
     }
-    p = p + pBlockCol->bsize;
-
-    // value
-    if (IS_VAR_DATA_TYPE(pBlockCol->type)) {
-      pColData->nData = pBlockCol->osize;
-    } else {
-      pColData->nData = tDataTypes[pBlockCol->type].bytes * pSubBlock->nRow;
-    }
-    code = tsdbRealloc(&pColData->pData, pColData->nData);
-    if (code) goto _err;
-
-    if (pSubBlock->cmprAlg == NO_COMPRESSION) {
-      memcpy(pColData->pData, p, pColData->nData);
-    } else {
-      size = pColData->nData + COMP_OVERFLOW_BYTES;
-      if (pSubBlock->cmprAlg == TWO_STAGE_COMP) {
-        code = tsdbRealloc(ppBuf2, size);
-        if (code) goto _err;
-      }
-
-      n = tDataTypes[pBlockCol->type].decompFunc(p, pBlockCol->csize, pSubBlock->nRow, pColData->pData, pColData->nData,
-                                                 pSubBlock->cmprAlg, *ppBuf2, size);
-      if (n < 0) {
-        code = TSDB_CODE_COMPRESS_ERROR;
-        goto _err;
-      }
-
-      ASSERT(n == pColData->nData);
-    }
-    p = p + pBlockCol->csize + sizeof(TSCKSUM);
   }
 
-  // TODO
   return code;
 
 _err:
diff --git a/source/dnode/vnode/src/tsdb/tsdbUtil.c b/source/dnode/vnode/src/tsdb/tsdbUtil.c
index 58397b1a9b..489d6d749a 100644
--- a/source/dnode/vnode/src/tsdb/tsdbUtil.c
+++ b/source/dnode/vnode/src/tsdb/tsdbUtil.c
@@ -545,6 +545,16 @@ int32_t tGetBlockCol(uint8_t *p, void *ph) {
   return n;
 }
 
+int32_t tBlockColCmprFn(const void *p1, const void *p2) {
+  if (((SBlockCol *)p1)->cid < ((SBlockCol *)p2)->cid) {
+    return -1;
+  } else if (((SBlockCol *)p1)->cid > ((SBlockCol *)p2)->cid) {
+    return 1;
+  }
+
+  return 0;
+}
+
 // SDelIdx ======================================================
 int32_t tCmprDelIdx(void const *lhs, void const *rhs) {
   SDelIdx *lDelIdx = *(SDelIdx **)lhs;