diff --git a/zh-cn/application-dev/napi/purgeable-memory-guidelines.md b/zh-cn/application-dev/napi/purgeable-memory-guidelines.md
index 24228677414b0f812ef489593deb867cfd632a84..584b023fbd00c355c0a3177a3a2c73396968b46e 100644
--- a/zh-cn/application-dev/napi/purgeable-memory-guidelines.md
+++ b/zh-cn/application-dev/napi/purgeable-memory-guidelines.md
@@ -18,7 +18,6 @@
 | bool OH_PurgeableMemory_Destroy(OH_PurgeableMemory \*purgObj) | 将Purgeable memory对象会被析构掉。 | 
 | bool OH_PurgeableMemory_BeginRead(OH_PurgeableMemory \*purgObj) | 对purgeable对象进行读访问。 | 
 | void OH_PurgeableMemory_EndRead(OH_PurgeableMemory \*purgObj) | 读操作结束，将Purgeable对象的引用计数减1，当引用计数为0的时候， 该Purgeable memory对象可以被系统回收。 | 
-| bool OH_PurgeableMemory_BeginWrite(OH_PurgeableMemory \*purgObj) | 通过NativeWindow对象申请一块NativeWindowBuffer，用以内容生产。 | 
 |bool OH_PurgeableMemory_BeginWrite(OH_PurgeableMemory \*purgObj) | 对purgeable对象进行写访问。|
 |void OH_PurgeableMemory_EndWrite(OH_PurgeableMemory \*purgObj)|写操作结束，将Purgeable对象的引用计数减1，当引用计数为0的时候，该Purgeable memory对象可以被系统回收。|
 |void \*OH_PurgeableMemory_GetContent(OH_PurgeableMemory \*purgObj)|获取PurgeableMemory对象内存数据。|