diff --git a/interfaces/innerkits/nativetoken/include/nativetoken.h b/interfaces/innerkits/nativetoken/include/nativetoken.h
index dc71d3888e53901c094f0b34747fc38c60d15294..e67f116be1c9b0aa4e3c66e4a6e10d69b855e908 100644
--- a/interfaces/innerkits/nativetoken/include/nativetoken.h
+++ b/interfaces/innerkits/nativetoken/include/nativetoken.h
@@ -95,7 +95,7 @@ typedef struct TokenList {
 } NativeTokenList;
 
 typedef struct StrArrayAttribute {
-    int32_t maxStrNum;
+    uint32_t maxStrNum;
     uint32_t maxStrLen;
     const char *strKey;
 } StrArrayAttr;
diff --git a/interfaces/innerkits/nativetoken/src/nativetoken_json_oper.c b/interfaces/innerkits/nativetoken/src/nativetoken_json_oper.c
index 7921b36cea88008651fa5a11f3d7f25ea0021c61..aac4de154c5f1a1cdc75da2c00e18bab679c10ce 100644
--- a/interfaces/innerkits/nativetoken/src/nativetoken_json_oper.c
+++ b/interfaces/innerkits/nativetoken/src/nativetoken_json_oper.c
@@ -76,7 +76,7 @@ uint32_t GetAplFromJson(cJSON *cjsonItem, NativeTokenList *tokenNode)
 uint32_t GetInfoArrFromJson(cJSON *cjsonItem, char *strArr[], int32_t *strNum, StrArrayAttr *attr)
 {
     cJSON *strArrJson = cJSON_GetObjectItem(cjsonItem, attr->strKey);
-    int32_t size = cJSON_GetArraySize(strArrJson);
+    uint32_t size = (uint32_t)cJSON_GetArraySize(strArrJson);
     if (size > attr->maxStrNum) {
         AT_LOG_ERROR("[ATLIB-%s]:size = %d is invalid.", __func__, size);
         return ATRET_FAILED;