diff --git a/source/libs/parser/src/parInsertStmt.c b/source/libs/parser/src/parInsertStmt.c
index 4c51ae65b2027837f182a21f7c686e27f119f82c..517cc24ff69800d549df3d55a719030a9d613406 100644
--- a/source/libs/parser/src/parInsertStmt.c
+++ b/source/libs/parser/src/parInsertStmt.c
@@ -149,31 +149,95 @@ end:
   return code;
 }
 
+int32_t convertStmtNcharCol(SMsgBuf* pMsgBuf, SSchema* pSchema, TAOS_MULTI_BIND* src, TAOS_MULTI_BIND* dst) {
+  int32_t output = 0;
+  int32_t newBuflen = (pSchema->bytes - VARSTR_HEADER_SIZE) * src->num;
+  if (dst->buffer_length < newBuflen) {
+    dst->buffer = taosMemoryRealloc(dst->buffer, newBuflen);
+    if (NULL == dst->buffer) {
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
+  }
+
+  if (NULL == dst->length) {
+    dst->length = taosMemoryRealloc(dst->length, sizeof(int32_t) * src->num);
+    if (NULL == dst->buffer) {
+      taosMemoryFreeClear(dst->buffer);
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
+  }
+
+  dst->buffer_length = pSchema->bytes - VARSTR_HEADER_SIZE;
+
+  for (int32_t i = 0; i < src->num; ++i) {
+    if (src->is_null && src->is_null[i]) {
+      continue;
+    }
+    
+    if (!taosMbsToUcs4(src->buffer + src->buffer_length * i, src->length[i], (TdUcs4*)(dst->buffer + dst->buffer_length * i), dst->buffer_length, &output)) {
+      if (errno == E2BIG) {
+        return generateSyntaxErrMsg(pMsgBuf, TSDB_CODE_PAR_VALUE_TOO_LONG, pSchema->name);
+      }
+      char buf[512] = {0};
+      snprintf(buf, tListLen(buf), "%s", strerror(errno));
+      return buildSyntaxErrMsg(pMsgBuf, buf, NULL);
+    }
+
+    dst->length[i] = output;
+  }
+
+  dst->buffer_type = src->buffer_type;
+  dst->is_null = src->is_null;
+  dst->num = src->num;
+
+  return TSDB_CODE_SUCCESS;
+}
+
 int32_t qBindStmtColsValue(void* pBlock, TAOS_MULTI_BIND* bind, char* msgBuf, int32_t msgBufLen) {
   STableDataCxt*      pDataBlock = (STableDataCxt*)pBlock;
   SSchema*            pSchema = getTableColumnSchema(pDataBlock->pMeta);
   SBoundColInfo*      boundInfo = &pDataBlock->boundColsInfo;
   SMsgBuf             pBuf = {.buf = msgBuf, .len = msgBufLen};
   int32_t             rowNum = bind->num;
+  TAOS_MULTI_BIND     ncharBind = {0};
+  TAOS_MULTI_BIND*    pBind = NULL;
+  int32_t             code = 0;
 
   for (int c = 0; c < boundInfo->numOfBound; ++c) {
     SSchema* pColSchema = &pSchema[boundInfo->pColIndex[c]];
     SColData* pCol = taosArrayGet(pDataBlock->pData->aCol, c);
 
     if (bind[c].num != rowNum) {
-      return buildInvalidOperationMsg(&pBuf, "row number in each bind param should be the same");
+      code = buildInvalidOperationMsg(&pBuf, "row number in each bind param should be the same");
+      goto _return;
     }
 
     if (bind[c].buffer_type != pColSchema->type) {
-      return buildInvalidOperationMsg(&pBuf, "column type mis-match with buffer type");
+      code = buildInvalidOperationMsg(&pBuf, "column type mis-match with buffer type");
+      goto _return;
     }
 
-    tColDataAddValueByBind(pCol, bind + c);
+    if (TSDB_DATA_TYPE_NCHAR == pColSchema->type) {
+      code = convertStmtNcharCol(&pBuf, pColSchema, bind + c, &ncharBind);
+      if (code) {
+        goto _return;
+      }
+      pBind = &ncharBind;
+    } else {
+      pBind = bind + c;
+    }
+
+    tColDataAddValueByBind(pCol, pBind);
   }
 
   qDebug("stmt all %d columns bind %d rows data", boundInfo->numOfBound, rowNum);
 
-  return TSDB_CODE_SUCCESS;
+_return:
+
+  taosMemoryFree(ncharBind.buffer);
+  taosMemoryFree(ncharBind.length);
+
+  return code;
 }
 
 int32_t qBindStmtSingleColValue(void* pBlock, TAOS_MULTI_BIND* bind, char* msgBuf, int32_t msgBufLen, int32_t colIdx,
@@ -184,6 +248,9 @@ int32_t qBindStmtSingleColValue(void* pBlock, TAOS_MULTI_BIND* bind, char* msgBu
   SMsgBuf             pBuf = {.buf = msgBuf, .len = msgBufLen};
   SSchema*            pColSchema = &pSchema[boundInfo->pColIndex[colIdx]];
   SColData*           pCol = taosArrayGet(pDataBlock->pData->aCol, colIdx);
+  TAOS_MULTI_BIND     ncharBind = {0};
+  TAOS_MULTI_BIND*    pBind = NULL;
+  int32_t             code = 0;
   
   if (bind->num != rowNum) {
     return buildInvalidOperationMsg(&pBuf, "row number in each bind param should be the same");
@@ -192,12 +259,27 @@ int32_t qBindStmtSingleColValue(void* pBlock, TAOS_MULTI_BIND* bind, char* msgBu
   if (bind->buffer_type != pColSchema->type) {
     return buildInvalidOperationMsg(&pBuf, "column type mis-match with buffer type");
   }
+
+  if (TSDB_DATA_TYPE_NCHAR == pColSchema->type) {
+    code = convertStmtNcharCol(&pBuf, pColSchema, bind, &ncharBind);
+    if (code) {
+      goto _return;
+    }
+    pBind = &ncharBind;
+  } else {
+    pBind = bind;
+  }
   
-  tColDataAddValueByBind(pCol, bind);
+  tColDataAddValueByBind(pCol, pBind);
 
   qDebug("stmt col %d bind %d rows data", colIdx, rowNum);
 
-  return TSDB_CODE_SUCCESS;
+_return:
+
+  taosMemoryFree(ncharBind.buffer);
+  taosMemoryFree(ncharBind.length);
+
+  return code;
 }
 
 int32_t buildBoundFields(int32_t numOfBound, int16_t* boundColumns, SSchema* pSchema, int32_t* fieldNum, TAOS_FIELD_E** fields,