diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index d33bdbb588a362a58816b23eb2226ae56da8f456..77ab9e84c378adbf0e3468dbf1fd28be3a4a62f2 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -1374,9 +1374,6 @@ int taos_stmt_set_tbname(TAOS_STMT* stmt, const char* name) {
 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) {
       for (uint16_t i = 0; i < normal->numParams; i++) {
@@ -1386,6 +1383,9 @@ int taos_stmt_close(TAOS_STMT* stmt) {
     }
     free(normal->parts);
     free(normal->sql);
+  } else {
+    taosHashCleanup(pStmt->mtb.pTableHash);
+    taosHashCleanup(pStmt->mtb.pTableBlockHashList);
   }
 
   taos_free_result(pStmt->pSql);
diff --git a/tests/script/api/batchprepare.c b/tests/script/api/batchprepare.c
index 9b204c2f4aac206f94c555b4274326178c18095b..5303b533297d40ba5de3e5a8292f555a67d7aa70 100644
--- a/tests/script/api/batchprepare.c
+++ b/tests/script/api/batchprepare.c
@@ -548,6 +548,12 @@ int stmt_funcb1(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -700,6 +706,12 @@ int stmt_funcb2(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -857,6 +869,12 @@ int stmt_funcb3(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -1010,6 +1028,12 @@ int stmt_funcb4(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -1157,6 +1181,12 @@ int stmt_funcb5(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -1236,6 +1266,11 @@ int stmt_funcb_ssz1(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(no_null);
+
   return 0;
 }
 
@@ -1388,6 +1423,12 @@ int stmt_funcb_s1(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -1544,6 +1585,12 @@ int stmt_funcb_sc1(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -1698,6 +1745,12 @@ int stmt_funcb_sc2(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -1849,6 +1902,12 @@ int stmt_funcb_sc3(TAOS_STMT *stmt) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%u useconds\n", 3000*300*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*300*60));
 
+  free(v.ts);  
+  free(lb);
+  free(params);
+  free(is_null);
+  free(no_null);
+
   return 0;
 }
 
@@ -1934,6 +1993,10 @@ int sql_perf1(TAOS     *taos) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%.1f useconds\n", 3000*120*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*120*60));
 
+  for (int i = 0; i < 3000; i++) {
+    free(sql[i]);
+  }
+
   return 0;
 }
 
@@ -1983,6 +2046,10 @@ int sql_perf_s1(TAOS     *taos) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%.1f useconds\n", 3000*120*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*120*60));
 
+  for (int i = 0; i < 360000; i++) {
+    free(sql[i]);
+  }
+
   return 0;
 }
 
@@ -2024,6 +2091,10 @@ int sql_s_perf1(TAOS     *taos) {
   unsigned long long endtime = getCurrentTime();
   printf("insert total %d records, used %u seconds, avg:%.1f useconds\n", 3000*120*60, (endtime-starttime)/1000000UL, (endtime-starttime)/(3000*120*60));
 
+  for (int i = 0; i < 3000; i++) {
+    free(sql[i]);
+  }
+
   return 0;
 }