diff --git a/zh-cn/application-dev/reference/apis/js-apis-system-storage.md b/zh-cn/application-dev/reference/apis/js-apis-system-storage.md
index d8ab77d05a02c98318648494c4e914b68b699f9e..b6893023f20e063ec8cf8ab7f01b1609632a7d6c 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-system-storage.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-system-storage.md
@@ -131,7 +131,7 @@ export default {
 
 delete(Object): void
 
-删除缓存中对应的键值对。
+删除缓存中索引对应的键值对。
 
 **系统能力：** SystemCapability.DistributedDataManager.Preferences.Core