diff --git a/include/common/tdatablock.h b/include/common/tdatablock.h
index 53fc07c3f368c769ce01242f39220a85da009458..6cb7d8852310082e0f1431c265c01752f5d527b7 100644
--- a/include/common/tdatablock.h
+++ b/include/common/tdatablock.h
@@ -248,6 +248,7 @@ int32_t buildSubmitReqFromDataBlock(SSubmitReq2** pReq, const SSDataBlock* pData
                                     tb_uid_t suid);
 
 char* buildCtbNameByGroupId(const char* stbName, uint64_t groupId);
+int32_t buildCtbNameByGroupIdImpl(const char* stbName, uint64_t groupId, char* pBuf);
 
 static FORCE_INLINE int32_t blockGetEncodeSize(const SSDataBlock* pBlock) {
   return blockDataGetSerialMetaSize(taosArrayGetSize(pBlock->pDataBlock)) + blockDataGetSize(pBlock);
diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 8316e6ef50eb6990bc08697a35aabac9e7175a48..51f2de481d120cfb6a044565fb0a482297e8660a 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -327,6 +327,7 @@ struct SStreamTask {
   int64_t             checkpointingId;
   int32_t             checkpointAlignCnt;
   struct SStreamMeta* pMeta;
+  SSHashObj*          pNameMap;
 };
 
 // meta
diff --git a/source/common/src/tdatablock.c b/source/common/src/tdatablock.c
index 24e978b0ea10f19ddbfdec5756d81e0fd35626a8..033fbb0ef164551f24e95be6e40b0844d763f2e9 100644
--- a/source/common/src/tdatablock.c
+++ b/source/common/src/tdatablock.c
@@ -2465,19 +2465,31 @@ _end:
 }
 
 char* buildCtbNameByGroupId(const char* stbFullName, uint64_t groupId) {
-  if (stbFullName[0] == 0) {
+  char* pBuf = taosMemoryCalloc(1, TSDB_TABLE_NAME_LEN + 1);
+  if (!pBuf) {
+    return NULL;
+  }
+  int32_t code = buildCtbNameByGroupIdImpl(stbFullName, groupId, pBuf);
+  if (code != TSDB_CODE_SUCCESS) {
+    taosMemoryFree(pBuf);
     return NULL;
   }
+  return pBuf;
+}
+
+int32_t buildCtbNameByGroupIdImpl(const char* stbFullName, uint64_t groupId, char* cname) {
+  if (stbFullName[0] == 0) {
+    return TSDB_CODE_FAILED;
+  }
 
   SArray* tags = taosArrayInit(0, sizeof(SSmlKv));
   if (tags == NULL) {
-    return NULL;
+    return TSDB_CODE_FAILED;
   }
 
-  void* cname = taosMemoryCalloc(1, TSDB_TABLE_NAME_LEN + 1);
   if (cname == NULL) {
     taosArrayDestroy(tags);
-    return NULL;
+    return TSDB_CODE_FAILED;
   }
 
   SSmlKv pTag = {.key = "group_id",
@@ -2499,9 +2511,9 @@ char* buildCtbNameByGroupId(const char* stbFullName, uint64_t groupId) {
   taosArrayDestroy(tags);
 
   if ((rname.ctbShortName && rname.ctbShortName[0]) == 0) {
-    return NULL;
+    return TSDB_CODE_FAILED;
   }
-  return rname.ctbShortName;
+  return TSDB_CODE_SUCCESS;
 }
 
 int32_t blockEncode(const SSDataBlock* pBlock, char* data, int32_t numOfCols) {
diff --git a/source/dnode/vnode/src/tq/tqSink.c b/source/dnode/vnode/src/tq/tqSink.c
index db1b5ed9029dc53c7907d2322cf1f9c648268b2a..9349c6eb0dd9f36073aceb7d76d769df9871e92a 100644
--- a/source/dnode/vnode/src/tq/tqSink.c
+++ b/source/dnode/vnode/src/tq/tqSink.c
@@ -298,10 +298,8 @@ void tqSinkToTablePipeline(SStreamTask* pTask, void* vnode, int64_t ver, void* d
         if (res == TSDB_CODE_SUCCESS) {
           memcpy(ctbName, pTableSinkInfo->tbName, strlen(pTableSinkInfo->tbName));
         } else {
-          char* tmp = buildCtbNameByGroupId(stbFullName, pDataBlock->info.id.groupId);
-          memcpy(ctbName, tmp, strlen(tmp));
-          memcpy(pTableSinkInfo->tbName, tmp, strlen(tmp));
-          taosMemoryFree(tmp);
+          buildCtbNameByGroupIdImpl(stbFullName, pDataBlock->info.id.groupId, ctbName);
+          memcpy(pTableSinkInfo->tbName, ctbName, strlen(ctbName));
           tqDebug("vgId:%d, gropuId:%" PRIu64 " datablock table name is null", TD_VID(pVnode),
                   pDataBlock->info.id.groupId);
         }
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index 9cb0a5664493ab444c1e81d778f700c53cbcefdc..922a1f534592dd11a1af7f34592a8251f178ec7b 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -15,6 +15,13 @@
 
 #include "streamInc.h"
 
+#define MAX_BLOCK_NAME_NUM 1024
+
+typedef struct SBlockName {
+  uint32_t hashValue;
+  char     parTbName[TSDB_TABLE_NAME_LEN];
+} SBlockName;
+
 int32_t tEncodeStreamDispatchReq(SEncoder* pEncoder, const SStreamDispatchReq* pReq) {
   if (tStartEncode(pEncoder) < 0) return -1;
   if (tEncodeI64(pEncoder, pReq->streamId) < 0) return -1;
@@ -331,26 +338,46 @@ FAIL:
 
 int32_t streamSearchAndAddBlock(SStreamTask* pTask, SStreamDispatchReq* pReqs, SSDataBlock* pDataBlock, int32_t vgSz,
                                 int64_t groupId) {
-  char* ctbName = taosMemoryCalloc(1, TSDB_TABLE_FNAME_LEN);
-  if (ctbName == NULL) {
-    return -1;
+  uint32_t   hashValue = 0;
+  SArray* vgInfo = pTask->shuffleDispatcher.dbInfo.pVgroupInfos;
+  if (pTask->pNameMap == NULL) {
+    pTask->pNameMap = tSimpleHashInit(1024, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT));
   }
 
-  if (pDataBlock->info.parTbName[0]) {
-    snprintf(ctbName, TSDB_TABLE_NAME_LEN, "%s.%s", pTask->shuffleDispatcher.dbInfo.db, pDataBlock->info.parTbName);
+  void* pVal = tSimpleHashGet(pTask->pNameMap, &groupId, sizeof(int64_t));
+  if (pVal) {
+    SBlockName* pBln = (SBlockName*)pVal;
+    hashValue = pBln->hashValue;
+    if (!pDataBlock->info.parTbName[0]) {
+      memcpy(pDataBlock->info.parTbName, pBln->parTbName, strlen(pBln->parTbName));
+    }
   } else {
-    char* ctbShortName = buildCtbNameByGroupId(pTask->shuffleDispatcher.stbFullName, groupId);
-    snprintf(ctbName, TSDB_TABLE_NAME_LEN, "%s.%s", pTask->shuffleDispatcher.dbInfo.db, ctbShortName);
-    taosMemoryFree(ctbShortName);
-  }
+    char* ctbName = taosMemoryCalloc(1, TSDB_TABLE_FNAME_LEN);
+    if (ctbName == NULL) {
+      return -1;
+    }
 
-  SArray* vgInfo = pTask->shuffleDispatcher.dbInfo.pVgroupInfos;
+    if (pDataBlock->info.parTbName[0]) {
+      snprintf(ctbName, TSDB_TABLE_NAME_LEN, "%s.%s", pTask->shuffleDispatcher.dbInfo.db, pDataBlock->info.parTbName);
+    } else {
+      buildCtbNameByGroupIdImpl(pTask->shuffleDispatcher.stbFullName, groupId, pDataBlock->info.parTbName);
+      snprintf(ctbName, TSDB_TABLE_NAME_LEN, "%s.%s", pTask->shuffleDispatcher.dbInfo.db, pDataBlock->info.parTbName);
+    }
 
-  /*uint32_t hashValue = MurmurHash3_32(ctbName, strlen(ctbName));*/
-  SUseDbRsp* pDbInfo = &pTask->shuffleDispatcher.dbInfo;
-  uint32_t   hashValue =
-      taosGetTbHashVal(ctbName, strlen(ctbName), pDbInfo->hashMethod, pDbInfo->hashPrefix, pDbInfo->hashSuffix);
-  taosMemoryFree(ctbName);
+    SArray* vgInfo = pTask->shuffleDispatcher.dbInfo.pVgroupInfos;
+
+    /*uint32_t hashValue = MurmurHash3_32(ctbName, strlen(ctbName));*/
+    SUseDbRsp* pDbInfo = &pTask->shuffleDispatcher.dbInfo;
+    hashValue =
+        taosGetTbHashVal(ctbName, strlen(ctbName), pDbInfo->hashMethod, pDbInfo->hashPrefix, pDbInfo->hashSuffix);
+    taosMemoryFree(ctbName);
+    SBlockName bln = {0};
+    bln.hashValue = hashValue;
+    memcpy(bln.parTbName, pDataBlock->info.parTbName, strlen(pDataBlock->info.parTbName));
+    if (tSimpleHashGetSize(pTask->pNameMap) < MAX_BLOCK_NAME_NUM) {
+      tSimpleHashPut(pTask->pNameMap, &groupId, sizeof(int64_t), &bln, sizeof(SBlockName));
+    }
+  }
 
   bool found = false;
   // TODO: optimize search
diff --git a/source/libs/stream/src/streamTask.c b/source/libs/stream/src/streamTask.c
index a0caffd41fc33c16de5e3b6cbe078d8b14cad94e..284d1ecab63423a7b52e80c23d197639d36b6844 100644
--- a/source/libs/stream/src/streamTask.c
+++ b/source/libs/stream/src/streamTask.c
@@ -224,5 +224,9 @@ void tFreeStreamTask(SStreamTask* pTask) {
     taosMemoryFree((void*)pTask->id.idStr);
   }
 
+  if (pTask->pNameMap) {
+    tSimpleHashCleanup(pTask->pNameMap);
+  }
+
   taosMemoryFree(pTask);
 }