diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index 9af7b11615..79701841df 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -1360,6 +1360,7 @@ int taos_stmt_close(TAOS_STMT* stmt) {
   STscStmt* pStmt = (STscStmt*)stmt;
   if (!pStmt->isInsert) {
     taosHashCleanup(pStmt->mtb.pTableHash);
+    taosHashCleanup(pStmt->mtb.pTableBlockHashList);
     
     SNormalStmt* normal = &pStmt->normal;
     if (normal->params != NULL) {