diff --git a/AST抽象语法树/6.AST操作之API用法-node节点/README.md b/AST抽象语法树/6.AST操作之API用法-node节点/README.md
new file mode 100644
index 0000000..8994690
--- /dev/null
+++ b/AST抽象语法树/6.AST操作之API用法-node节点/README.md
@@ -0,0 +1,122 @@
+# AST操作之API用法-node节点
+
+在抽象语法树（Abstract Syntax Tree，AST）中，`path.node` 是指表示当前节点的 AST 节点对象。它提供了关于该节点的信息，包括节点的类型和其他属性。
+
+看语法就可以猜到`node`就是path的一个属性
+
+| api                               | 功能                                   |
+|:----------------------------------|--------------------------------------|
+| path.node.type                    | 获取当前节点的类型。                           |
+| path.node.declarations            | 对于 VariableDeclaration 节点, 获取变量声明列表。 |
+| node.init.value                   | 获取某个节点的值。                            |
+| delete path.node.init;            | 删除节点，使用系统的 delete 方法。                |
+
+**遍历打印出节点类型**
+
+```javascript
+const fs = require('fs');
+const {parse} = require("@babel/parser");
+const traverse = require("@babel/traverse").default;
+const generator = require("@babel/generator").default;
+let encode_file = "./encode.js";
+
+let js_code = fs.readFileSync(encode_file, {encoding: "utf-8"});
+let ast = parse(js_code, {
+sourceType: 'module',
+});
+
+const visitor = {
+    enter(path) {
+        console.log(path.node.type)
+    },
+}
+
+traverse(ast, visitor);
+```
+
+输出
+```javascript
+Program
+VariableDeclaration
+VariableDeclarator
+Identifier
+NumericLiteral
+var a = 123;
+```
+
+**遍历节点打印出 VariableDeclaration 节点的变量声明列表**
+
+```javascript
+const visitor = {
+    enter(path) {
+        console.log(path.node.declarations)
+    },
+}
+```
+
+输出
+
+```javascript
+undefined
+[
+  Node {
+    type: 'VariableDeclarator',
+    start: 4,
+    end: 11,
+    loc: SourceLocation {
+      start: [Position],
+      end: [Position],
+      filename: undefined,
+      identifierName: undefined
+    },
+    id: Node {
+      type: 'Identifier',
+      start: 4,
+      end: 5,
+      loc: [SourceLocation],
+      name: 'a'
+    },
+    init: Node {
+      type: 'NumericLiteral',
+      start: 8,
+      end: 11,
+      loc: [SourceLocation],
+      extra: [Object],
+      value: 123
+    }
+  }
+]
+undefined
+undefined
+undefined
+var a = 123;
+```
+
+**获取某个节点的值**
+```javascript
+const visitor = {
+    VariableDeclarator(path) {
+        console.log(path.node.init.value)
+    },
+}
+```
+
+输出
+```javascript
+123
+```
+
+**删除某个节点的值**
+
+```javascript
+const visitor = {
+    VariableDeclarator(path) {
+        delete path.node.init.value
+    },
+}
+```
+
+输出
+```javascript
+var a = undefined;
+```
\ No newline at end of file
diff --git a/AST抽象语法树/6.AST操作之API用法-node节点/decode_obfuscator.js b/AST抽象语法树/6.AST操作之API用法-node节点/decode_obfuscator.js
index 4089908..d57be4a 100644
--- a/AST抽象语法树/6.AST操作之API用法-node节点/decode_obfuscator.js
+++ b/AST抽象语法树/6.AST操作之API用法-node节点/decode_obfuscator.js
@@ -1,21 +1,24 @@
 const fs = require('fs');
-const { parse } = require('@babel/parser');
-const traverse = require('@babel/traverse').default;
-const generator = require('@babel/generator').default;
-let encode_file = './encode.js';
+const {parse} = require("@babel/parser");
+const traverse = require("@babel/traverse").default;
+const generator = require("@babel/generator").default;
+let encode_file = "./encode.js";
 
-let js_code = fs.readFileSync(encode_file, { encoding: 'utf-8' });
+let js_code = fs.readFileSync(encode_file, {encoding: "utf-8"});
 let ast = parse(js_code, {
     sourceType: 'module',
 });
 
-traverse(ast, {
-    NumericLiteral(path) {
-        path.replaceWith(
-            parse(3).program.body[0].expression
-        );
+const visitor = {
+    VariableDeclarator(path) {
+        delete path.node.init.value
     },
-});
+}
 
-const output = generator(ast).code;
-console.log(output);
+traverse(ast, visitor);
+
+// 写入文件
+let {code} = generator(ast);
+console.log(code)
+fs.writeFile('decode.js', code, (err) => {
+});