diff --git a/Python/androguard/3 androguard 入门.ipynb b/Python/androguard/3 androguard 入门.ipynb
index 78c56ddc..74c774d1 100644
--- a/Python/androguard/3 androguard 入门.ipynb	
+++ b/Python/androguard/3 androguard 入门.ipynb	
@@ -190,6 +190,34 @@
     "* d一个DalvikVMFormat对象数组\n",
     "\n",
     "* dx一个Analysis对象\n",
+    "\n",
+    "### 最重要的顶级 API 类\n",
+    "\n",
+    "```\n",
+    "APK解析器\n",
+    "androguard.core.bytecodes.apk.APK\n",
+    "\n",
+    "DEX 解析器\n",
+    "androguard.core.bytecodes.dvm.DalvikVMFormat\n",
+    "\n",
+    "AXML 解析器\n",
+    "androguard.core.bytecodes.axml.AXMLPrinter\n",
+    "\n",
+    "ARSC 解析器\n",
+    "androguard.core.bytecodes.axml.ARSCParser\n",
+    "\n",
+    "分析\n",
+    "androguard.core.analysis.analysis.Analysis\n",
+    "\n",
+    "会议\n",
+    "androguard.session.Session\n",
+    "\n",
+    "自动分析\n",
+    "androguard.core.analysis.auto.AndroAuto\n",
+    "\n",
+    "反编译器\n",
+    "androguard.decompiler.decompiler\n",
+    "```\n",
     "### 对象a的方法和属性\n",
     "```\n",
     "dir(a)\n",
@@ -423,6 +451,13 @@
     "1. 在.virtualenv/pytorch/bin中有androguard命令，执行androguard分析的时候会使用这个命令。\n",
     "2. 在.virtualenv/pytorch/bin中有androaxml,androarsc,androsign,androcg等python脚本，可以模仿这些脚本在python代码中使用androguard进行据不分析，而不需要进行完整的分析得到a,d,dx三个对象，这样会浪费大量的时间。"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {