diff --git a/source/client/inc/clientSml.h b/source/client/inc/clientSml.h
index 11f72efeaf..99bb27fe32 100644
--- a/source/client/inc/clientSml.h
+++ b/source/client/inc/clientSml.h
@@ -182,6 +182,7 @@ typedef struct {
   int8_t             offset[OTD_JSON_FIELDS_NUM];
   SSmlLineInfo      *lines; // element is SSmlLineInfo
   bool               parseJsonByLib;
+  SArray      *tagJsonArray;
 
   //
   SArray      *preLineTagKV;
diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index 71349e61ec..574af8d336 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1053,6 +1053,12 @@ void smlDestroyInfo(SSmlHandle *info) {
   // destroy info->pVgHash
   taosHashCleanup(info->pVgHash);
 
+  for(int i = 0; i< taosArrayGetSize(info->tagJsonArray); i++){
+    cJSON *tags = (cJSON *)taosArrayGetP(info->tagJsonArray, i);
+    cJSON_Delete(tags);
+  }
+  taosArrayDestroy(info->tagJsonArray);
+
   taosArrayDestroy(info->preLineTagKV);
   taosArrayDestroy(info->maxTagKVs);
   taosArrayDestroy(info->preLineColKV);
@@ -1091,6 +1097,7 @@ SSmlHandle *smlBuildSmlInfo(TAOS *taos) {
   info->pQuery = smlInitHandle();
   info->dataFormat = true;
 
+  info->tagJsonArray = taosArrayInit(8, POINTER_BYTES);
   info->preLineTagKV = taosArrayInit(8, sizeof(SSmlKv));
   info->maxTagKVs = taosArrayInit(8, sizeof(SSmlKv));
   info->preLineColKV = taosArrayInit(8, sizeof(SSmlKv));
diff --git a/source/client/src/clientSmlJson.c b/source/client/src/clientSmlJson.c
index a5b5abeda2..26b8e9e13c 100644
--- a/source/client/src/clientSmlJson.c
+++ b/source/client/src/clientSmlJson.c
@@ -1118,8 +1118,8 @@ static int32_t smlParseJSONString(SSmlHandle *info, char **start, SSmlLineInfo *
       return TSDB_CODE_TSC_INVALID_JSON;
     }
 
+    taosArrayPush(info->tagJsonArray, &tagsJson);
     ret = smlParseTagsFromJSON(info, tagsJson, elements);
-    cJSON_free(tagsJson);
     if (unlikely(ret)) {
       uError("OTD:0x%" PRIx64 " Unable to parse tags from JSON payload", info->id);
       return ret;