diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index de812db68be99d785e9319409a49b113f3dc2e34..0aca468acbfee179aaa2426ce5f24c5e1cd16a05 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -2019,3 +2019,34 @@ int32_t tDeserializeSMTimerMsg(void *buf, int32_t bufLen, SMTimerReq *pReq) {
   tCoderClear(&decoder);
   return 0;
 }
+
+int32_t tSerializeSDropVnodeReq(void *buf, int32_t bufLen, SDropVnodeReq *pReq) {
+  SCoder encoder = {0};
+  tCoderInit(&encoder, TD_LITTLE_ENDIAN, buf, bufLen, TD_ENCODER);
+
+  if (tStartEncode(&encoder) < 0) return -1;
+  if (tEncodeI32(&encoder, pReq->vgId) < 0) return -1;
+  if (tEncodeI32(&encoder, pReq->dnodeId) < 0) return -1;
+  if (tEncodeU64(&encoder, pReq->dbUid) < 0) return -1;
+  if (tEncodeCStr(&encoder, pReq->db) < 0) return -1;
+  tEndEncode(&encoder);
+
+  int32_t tlen = encoder.pos;
+  tCoderClear(&encoder);
+  return tlen;
+}
+
+int32_t tDeserializeSDropVnodeReq(void *buf, int32_t bufLen, SDropVnodeReq *pReq) {
+  SCoder decoder = {0};
+  tCoderInit(&decoder, TD_LITTLE_ENDIAN, buf, bufLen, TD_DECODER);
+
+  if (tStartDecode(&decoder) < 0) return -1;
+  if (tDecodeI32(&decoder, &pReq->vgId) < 0) return -1;
+  if (tDecodeI32(&decoder, &pReq->dnodeId) < 0) return -1;
+  if (tDecodeI64(&decoder, &pReq->dbUid) < 0) return -1;
+  if (tDecodeCStrTo(&decoder, pReq->db) < 0) return -1;
+  tEndDecode(&decoder);
+
+  tCoderClear(&decoder);
+  return 0;
+}
\ No newline at end of file
diff --git a/source/dnode/mgmt/impl/src/dndVnodes.c b/source/dnode/mgmt/impl/src/dndVnodes.c
index 91bf0dfa833f1736f2db708c817e234d16826fd4..0a417788f9dd7928ddfb19dac8c078e765ae982d 100644
--- a/source/dnode/mgmt/impl/src/dndVnodes.c
+++ b/source/dnode/mgmt/impl/src/dndVnodes.c
@@ -556,12 +556,6 @@ static void dndGenerateWrapperCfg(SDnode *pDnode, SCreateVnodeReq *pCreate, SWra
   pCfg->vgVersion = pCreate->vgVersion;
 }
 
-static SDropVnodeReq *dndParseDropVnodeReq(SRpcMsg *pReq) {
-  SDropVnodeReq *pDrop = pReq->pCont;
-  pDrop->vgId = htonl(pDrop->vgId);
-  return pDrop;
-}
-
 int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
   SCreateVnodeReq *pCreate = dndParseCreateVnodeReq(pReq);
   dDebug("vgId:%d, create vnode req is received", pCreate->vgId);
@@ -652,9 +646,10 @@ int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 }
 
 int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
-  SDropVnodeReq *pDrop = dndParseDropVnodeReq(pReq);
+  SDropVnodeReq dropReq = {0};
+  tDeserializeSDropVnodeReq(pReq->pCont, pReq->contLen, &dropReq);
 
-  int32_t vgId = pDrop->vgId;
+  int32_t vgId = dropReq.vgId;
   dDebug("vgId:%d, drop vnode req is received", vgId);
 
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
@@ -678,9 +673,10 @@ int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 }
 
 int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
-  SSyncVnodeReq *pSync = (SSyncVnodeReq *)dndParseDropVnodeReq(pReq);
+  SSyncVnodeReq syncReq = {0};
+  tDeserializeSDropVnodeReq(pReq->pCont, pReq->contLen, &syncReq);
 
-  int32_t vgId = pSync->vgId;
+  int32_t vgId = syncReq.vgId;
   dDebug("vgId:%d, sync vnode req is received", vgId);
 
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
@@ -700,9 +696,10 @@ int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 }
 
 int32_t dndProcessCompactVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
-  SCompactVnodeReq *pCompact = (SCompactVnodeReq *)dndParseDropVnodeReq(pReq);
+  SCompactVnodeReq compatcReq = {0};
+  tDeserializeSDropVnodeReq(pReq->pCont, pReq->contLen, &compatcReq);
 
-  int32_t vgId = pCompact->vgId;
+  int32_t vgId = compatcReq.vgId;
   dDebug("vgId:%d, compact vnode req is received", vgId);
 
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
diff --git a/source/dnode/mgmt/impl/test/vnode/vnode.cpp b/source/dnode/mgmt/impl/test/vnode/vnode.cpp
index 380a837c58312a5be3a10241bddb32bb4e9d18b0..0e9f0bd5bf95b73a07f614e62b2dbcc03b5c7711 100644
--- a/source/dnode/mgmt/impl/test/vnode/vnode.cpp
+++ b/source/dnode/mgmt/impl/test/vnode/vnode.cpp
@@ -312,17 +312,19 @@ TEST_F(DndTestVnode, 05_DROP_Stb) {
 
 TEST_F(DndTestVnode, 06_Drop_Vnode) {
   for (int i = 0; i < 3; ++i) {
-    int32_t contLen = sizeof(SDropVnodeReq);
+    SDropVnodeReq dropReq = {0};
+    dropReq.vgId = 2;
+    dropReq.dnodeId = 1;
+    strcpy(dropReq.db, "1.d1");
+    dropReq.dbUid = 9527;
 
-    SDropVnodeReq* pReq = (SDropVnodeReq*)rpcMallocCont(contLen);
-    pReq->vgId = htonl(2);
-    pReq->dnodeId = htonl(1);
-    strcpy(pReq->db, "1.d1");
-    pReq->dbUid = htobe64(9527);
+    int32_t contLen = tSerializeSDropVnodeReq(NULL, 0, &dropReq);
+    void*   pReq = rpcMallocCont(contLen);
+    tSerializeSDropVnodeReq(pReq, contLen, &dropReq);
 
     SRpcMsg rpcMsg = {0};
     rpcMsg.pCont = pReq;
-    rpcMsg.contLen = sizeof(SDropVnodeReq);
+    rpcMsg.contLen = contLen;
     rpcMsg.msgType = TDMT_DND_DROP_VNODE;
 
     SRpcMsg* pRsp = test.SendReq(TDMT_DND_DROP_VNODE, pReq, contLen);
diff --git a/source/dnode/mnode/impl/inc/mndVgroup.h b/source/dnode/mnode/impl/inc/mndVgroup.h
index 6ab11aa1b4051ac40869b86de7c988ea21dd3eaa..ea9d509815f4b1598529a0b86a43b3e43fb2090c 100644
--- a/source/dnode/mnode/impl/inc/mndVgroup.h
+++ b/source/dnode/mnode/impl/inc/mndVgroup.h
@@ -32,7 +32,7 @@ SEpSet   mndGetVgroupEpset(SMnode *pMnode, SVgObj *pVgroup);
 int32_t  mndGetVnodesNum(SMnode *pMnode, int32_t dnodeId);
 
 SCreateVnodeReq *mndBuildCreateVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
-SDropVnodeReq   *mndBuildDropVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
+SDropVnodeReq *mndBuildDropVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup, int32_t *pContLen);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mnode/impl/src/mndDb.c b/source/dnode/mnode/impl/src/mndDb.c
index 0cceb1084b401053f3969ca87fe7cd9ab046bfc7..ce308e221ff78374b16c7ba3e80064e92cd01907 100644
--- a/source/dnode/mnode/impl/src/mndDb.c
+++ b/source/dnode/mnode/impl/src/mndDb.c
@@ -365,11 +365,12 @@ static int32_t mndSetCreateDbUndoActions(SMnode *pMnode, STrans *pTrans, SDbObj
       action.epSet = mndGetDnodeEpset(pDnode);
       mndReleaseDnode(pMnode, pDnode);
 
-      SDropVnodeReq *pReq = mndBuildDropVnodeReq(pMnode, pDnode, pDb, pVgroup);
+      int32_t        contLen = 0;
+      SDropVnodeReq *pReq = mndBuildDropVnodeReq(pMnode, pDnode, pDb, pVgroup, &contLen);
       if (pReq == NULL) return -1;
 
       action.pCont = pReq;
-      action.contLen = sizeof(SDropVnodeReq);
+      action.contLen = contLen;
       action.msgType = TDMT_DND_DROP_VNODE;
       action.acceptableCode = TSDB_CODE_DND_VNODE_NOT_DEPLOYED;
       if (mndTransAppendUndoAction(pTrans, &action) != 0) {
@@ -754,11 +755,12 @@ static int32_t mndBuildDropVgroupAction(SMnode *pMnode, STrans *pTrans, SDbObj *
     action.epSet = mndGetDnodeEpset(pDnode);
     mndReleaseDnode(pMnode, pDnode);
 
-    SDropVnodeReq *pReq = mndBuildDropVnodeReq(pMnode, pDnode, pDb, pVgroup);
+    int32_t        contLen = 0;
+    SDropVnodeReq *pReq = mndBuildDropVnodeReq(pMnode, pDnode, pDb, pVgroup, &contLen);
     if (pReq == NULL) return -1;
 
     action.pCont = pReq;
-    action.contLen = sizeof(SDropVnodeReq);
+    action.contLen = contLen;
     action.msgType = TDMT_DND_DROP_VNODE;
     action.acceptableCode = TSDB_CODE_DND_VNODE_NOT_DEPLOYED;
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
diff --git a/source/dnode/mnode/impl/src/mndVgroup.c b/source/dnode/mnode/impl/src/mndVgroup.c
index 819dea4910a394fc35e6e0389317f5fa93429cfa..997388c82865062145f2a79b426876028768dffa 100644
--- a/source/dnode/mnode/impl/src/mndVgroup.c
+++ b/source/dnode/mnode/impl/src/mndVgroup.c
@@ -248,19 +248,29 @@ SCreateVnodeReq *mndBuildCreateVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbOb
   return pCreate;
 }
 
-SDropVnodeReq *mndBuildDropVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
-  SDropVnodeReq *pDrop = calloc(1, sizeof(SDropVnodeReq));
-  if (pDrop == NULL) {
+SDropVnodeReq *mndBuildDropVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup,
+                                    int32_t *pContLen) {
+  SDropVnodeReq dropReq = {0};
+  dropReq.dnodeId = pDnode->id;
+  dropReq.vgId = pVgroup->vgId;
+  memcpy(dropReq.db, pDb->name, TSDB_DB_FNAME_LEN);
+  dropReq.dbUid = pDb->uid;
+
+  int32_t contLen = tSerializeSDropVnodeReq(NULL, 0, &dropReq);
+  if (contLen < 0) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return NULL;
   }
 
-  pDrop->dnodeId = htonl(pDnode->id);
-  pDrop->vgId = htonl(pVgroup->vgId);
-  memcpy(pDrop->db, pDb->name, TSDB_DB_FNAME_LEN);
-  pDrop->dbUid = htobe64(pDb->uid);
+  void *pReq = malloc(contLen);
+  if (pReq == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return NULL;
+  }
 
-  return pDrop;
+  tSerializeSDropVnodeReq(pReq, contLen, &dropReq);
+  *pContLen = contLen;
+  return pReq;
 }
 
 static bool mndResetDnodesArrayFp(SMnode *pMnode, void *pObj, void *p1, void *p2, void *p3) {