diff --git a/src/readers/ComponentsReader.ts b/src/readers/ComponentsReader.ts
index b9585df..c110ece 100644
--- a/src/readers/ComponentsReader.ts
+++ b/src/readers/ComponentsReader.ts
@@ -1,7 +1,7 @@
 import { OpenAPIV3 } from 'openapi-types';
+import { isBoolean } from '../utils/type-is';
 import { BaseReader } from './BaseReader';
-import { Named } from './Named';
-import { TypeAlias, TypeList, TypeOrigin, TypeUnit } from './types';
+import { TypeAlias, TypeItem, TypeList, TypeOrigin, TypeUnit } from './types';
 
 export class ComponentsReader extends BaseReader {
   readComponents(): TypeList {
@@ -25,10 +25,10 @@ export class ComponentsReader extends BaseReader {
     return t;
   }
 
-  protected readReference(name: string, reference: OpenAPIV3.ReferenceObject, root = false): TypeAlias {
+  protected readReference(name: string, reference: OpenAPIV3.ReferenceObject, refAble = false): TypeAlias {
     return this.named.addAlias({
       kind: 'alias',
-      root,
+      refAble,
       name,
       ref: reference.$ref,
       target: '',
@@ -77,35 +77,69 @@ export class ComponentsReader extends BaseReader {
 
   protected readSchemaObject(name: string, required: boolean, schema: OpenAPIV3.SchemaObject): TypeOrigin {
     const properties = Object.entries(schema.properties || {}).sort((a, b) => a[0].localeCompare(b[0]));
+    const children = properties.map(([propName, propSchema]) => {
+      return this.isReference(propSchema)
+        ? this.readReference(propName, propSchema)
+        : this.readSchema(propName, schema.required?.includes(propName) || false, propSchema);
+    });
+
+    const additional = this.readObjectAdditionalProperties(schema.additionalProperties);
+    if (additional) children.push(additional);
+
     return {
       ...this.inheritProps(schema),
       name,
       required,
       kind: 'origin',
       type: 'object',
-      children: properties.map(([propName, propSchema]) => {
-        return this.isReference(propSchema)
-          ? this.readReference(propName, propSchema)
-          : this.readSchema(propName, schema.required?.includes(propName) || false, propSchema);
-      }),
+      children,
     };
   }
 
   protected readSchemaArray(name: string, required: boolean, schema: OpenAPIV3.ArraySchemaObject): TypeOrigin {
+    const children = [schema.items].map((schema) => {
+      return this.isReference(schema)
+        ? this.readReference(`${name}[]`, schema)
+        : this.readSchema(`${name}[]`, schema.nullable === false, schema);
+    });
+
+    const additional = this.readObjectAdditionalProperties(schema.additionalProperties);
+    if (additional) children.push(additional);
+
     return {
       ...this.inheritProps(schema),
       name,
       required,
       kind: 'origin',
       type: 'array',
-      children: [schema.items].map((schema) => {
-        return this.isReference(schema)
-          ? this.readReference(`${name}[]`, schema)
-          : this.readSchema(`${name}[]`, schema.nullable === false, schema);
-      }),
+      children: children,
     };
   }
 
+  protected readObjectAdditionalProperties(
+    additionalProperties: OpenAPIV3.SchemaObject['additionalProperties']
+  ): TypeItem | undefined {
+    if (!additionalProperties) return;
+
+    const name = '[key: string]';
+
+    if (isBoolean(additionalProperties)) {
+      if (additionalProperties) {
+        return {
+          kind: 'origin',
+          type: 'any',
+          name,
+          required: true,
+        };
+      }
+      return;
+    }
+
+    return this.isReference(additionalProperties)
+      ? this.readReference(name, additionalProperties)
+      : this.readSchema(name, true, additionalProperties);
+  }
+
   protected readSchemaNever(name: string, required: boolean, schema: OpenAPIV3.SchemaObject): TypeOrigin {
     return {
       ...this.inheritProps(schema),
diff --git a/src/readers/Named.ts b/src/readers/Named.ts
index 8decad7..43a36eb 100644
--- a/src/readers/Named.ts
+++ b/src/readers/Named.ts
@@ -10,19 +10,21 @@ export class Named {
   }
   resolveAlias() {
     this.unresolvedAliasList.forEach((a) => {
+      if (!a.ref) return;
+
       const info = refToType(a.ref);
       a.target = this.getName(info.base);
       a.props = info.props;
 
       // 指向另外一个地址
-      const { root, name, target } = a;
-      if (root) {
+      const { refAble, name, target } = a;
+      if (refAble) {
         this.aliasRelationMap.set(name, target);
       }
     });
 
     this.unresolvedAliasList.forEach((a) => {
-      a.origin = findOrigin(a.root ? a.name : a.target, this.aliasRelationMap);
+      a.origin = findOrigin(a.refAble ? a.name : a.target, this.aliasRelationMap);
     });
 
     this.unresolvedAliasList.length = 0;
diff --git a/src/readers/PathsReader.ts b/src/readers/PathsReader.ts
index 10395e5..178c4f4 100644
--- a/src/readers/PathsReader.ts
+++ b/src/readers/PathsReader.ts
@@ -131,12 +131,10 @@ export class PathsReader extends ComponentsReader {
       return {
         kind: 'alias',
         name,
-        root: false,
+        refAble: false,
         target: 'Blob',
         origin: 'Blob',
         props: [],
-        required: true,
-        ref: '',
       };
   }
 
diff --git a/src/readers/types.ts b/src/readers/types.ts
index bcd6678..eb9d36b 100644
--- a/src/readers/types.ts
+++ b/src/readers/types.ts
@@ -1,7 +1,4 @@
-import { OpenAPIV3 } from 'openapi-types';
-
-export type TypeKind = 'origin' | 'alias';
-export type TypeUnit = 'number' | 'string' | 'boolean' | 'never' | 'object' | 'array';
+export type TypeUnit = 'number' | 'string' | 'boolean' | 'never' | 'object' | 'array' | 'any';
 
 export interface TypeComments {
   title?: string;
@@ -13,7 +10,7 @@ export interface TypeComments {
 }
 
 export interface TypeOrigin extends TypeComments {
-  kind: TypeKind;
+  kind: 'origin';
   name: string;
   type: TypeUnit;
   required: boolean;
@@ -22,13 +19,13 @@ export interface TypeOrigin extends TypeComments {
 }
 
 export interface TypeAlias extends TypeComments {
-  kind: TypeKind;
-  root: boolean;
+  kind: 'alias';
+  refAble: boolean;
   name: string;
   target: string;
   origin: string;
   props: string[];
-  ref: string;
+  ref?: string;
 }
 
 export type TypeItem = TypeOrigin | TypeAlias;
diff --git a/test/readers/ComponentsReader.test.ts b/test/readers/ComponentsReader.test.ts
index 5bd3afd..2b1188f 100644
--- a/test/readers/ComponentsReader.test.ts
+++ b/test/readers/ComponentsReader.test.ts
@@ -82,7 +82,7 @@ test('ref once', () => {
     },
     {
       kind: 'alias',
-      root: true,
+      refAble: true,
       name: 'T',
       target: 'P',
       origin: 'P',
@@ -118,8 +118,8 @@ test('ref twice', () => {
   const t = reader.readComponents();
   expect(t).toEqual<TypeList>([
     { kind: 'origin', name: 'K', type: 'string', required: false },
-    { kind: 'alias', root: true, name: 'P', target: 'K', origin: 'K', props: [], ref: '#/components/schemas/K' },
-    { kind: 'alias', root: true, name: 'T', target: 'P', origin: 'K', props: [], ref: '#/components/schemas/P' },
+    { kind: 'alias', refAble: true, name: 'P', target: 'K', origin: 'K', props: [], ref: '#/components/schemas/K' },
+    { kind: 'alias', refAble: true, name: 'T', target: 'P', origin: 'K', props: [], ref: '#/components/schemas/P' },
   ]);
 });
 
@@ -189,6 +189,7 @@ test('object', () => {
             },
           },
           required: ['B', 'S', 'N', 'I'],
+          additionalProperties: true,
         },
         R: {
           type: 'string',
@@ -209,8 +210,17 @@ test('object', () => {
         { name: 'B', type: 'boolean', required: true, kind: 'origin' },
         { name: 'I', type: 'number', required: true, kind: 'origin' },
         { name: 'N', type: 'number', required: true, kind: 'origin' },
-        { kind: 'alias', root: false, name: 'R', target: 'R', origin: 'R', props: [], ref: '#/components/schemas/R' },
+        {
+          kind: 'alias',
+          refAble: false,
+          name: 'R',
+          target: 'R',
+          origin: 'R',
+          props: [],
+          ref: '#/components/schemas/R',
+        },
         { name: 'S', type: 'string', required: true, kind: 'origin' },
+        { name: '[key: string]', type: 'any', required: true, kind: 'origin' },
       ],
     },
     {
@@ -238,6 +248,12 @@ test('array', () => {
           items: {
             type: 'string',
           },
+          additionalProperties: {
+            $ref: '#/components/schema/T',
+          },
+        },
+        T: {
+          type: 'string',
         },
       },
     },
@@ -250,7 +266,24 @@ test('array', () => {
       name: 'A',
       type: 'array',
       required: true,
-      children: [{ name: 'A[]', type: 'string', required: false, kind: 'origin' }],
+      children: [
+        { kind: 'origin', name: 'A[]', type: 'string', required: false },
+        {
+          kind: 'alias',
+          name: '[key: string]',
+          target: 'T',
+          origin: 'T',
+          props: [],
+          refAble: false,
+          ref: '#/components/schema/T',
+        },
+      ],
+    },
+    {
+      kind: 'origin',
+      name: 'T',
+      type: 'string',
+      required: false,
     },
   ]);
 });
diff --git a/test/readers/DocumentReader.test.ts b/test/readers/DocumentReader.test.ts
index d74eac5..b49e745 100644
--- a/test/readers/DocumentReader.test.ts
+++ b/test/readers/DocumentReader.test.ts
@@ -184,7 +184,7 @@ test('DocumentReader', () => {
                   "origin": "Address",
                   "props": [],
                   "ref": "#/components/schemas/Address",
-                  "root": false,
+                  "refAble": false,
                   "target": "Address",
                 },
               ],
@@ -344,7 +344,7 @@ test('DocumentReader', () => {
               "origin": "Category",
               "props": [],
               "ref": "#/components/schemas/Category",
-              "root": false,
+              "refAble": false,
               "target": "Category",
             },
             {
@@ -426,7 +426,7 @@ test('DocumentReader', () => {
                   "origin": "Tag",
                   "props": [],
                   "ref": "#/components/schemas/Tag",
-                  "root": false,
+                  "refAble": false,
                   "target": "Tag",
                 },
               ],
@@ -642,7 +642,7 @@ test('DocumentReader', () => {
               "origin": "Pet",
               "props": [],
               "ref": "#/components/schemas/Pet",
-              "root": false,
+              "refAble": false,
               "target": "Pet",
             },
             "path": undefined,
@@ -655,7 +655,7 @@ test('DocumentReader', () => {
               "origin": "Pet",
               "props": [],
               "ref": "#/components/schemas/Pet",
-              "root": false,
+              "refAble": false,
               "target": "Pet",
             },
           },
@@ -674,7 +674,7 @@ test('DocumentReader', () => {
               "origin": "Pet",
               "props": [],
               "ref": "#/components/schemas/Pet",
-              "root": false,
+              "refAble": false,
               "target": "Pet",
             },
             "path": undefined,
@@ -687,7 +687,7 @@ test('DocumentReader', () => {
               "origin": "Pet",
               "props": [],
               "ref": "#/components/schemas/Pet",
-              "root": false,
+              "refAble": false,
               "target": "Pet",
             },
           },
@@ -767,7 +767,7 @@ test('DocumentReader', () => {
               "origin": "Pet",
               "props": [],
               "ref": "#/components/schemas/Pet",
-              "root": false,
+              "refAble": false,
               "target": "Pet",
             },
           },
@@ -854,9 +854,7 @@ test('DocumentReader', () => {
               "name": "UploadFileReqData",
               "origin": "Blob",
               "props": [],
-              "ref": "",
-              "required": true,
-              "root": false,
+              "refAble": false,
               "target": "Blob",
             },
             "path": {
@@ -909,7 +907,7 @@ test('DocumentReader', () => {
               "origin": "ApiResponse",
               "props": [],
               "ref": "#/components/schemas/ApiResponse",
-              "root": false,
+              "refAble": false,
               "target": "ApiResponse",
             },
           },
@@ -959,7 +957,7 @@ test('DocumentReader', () => {
                   "origin": "Pet",
                   "props": [],
                   "ref": "#/components/schemas/Pet",
-                  "root": false,
+                  "refAble": false,
                   "target": "Pet",
                 },
               ],
@@ -1033,7 +1031,7 @@ test('DocumentReader', () => {
                   "origin": "Pet",
                   "props": [],
                   "ref": "#/components/schemas/Pet",
-                  "root": false,
+                  "refAble": false,
                   "target": "Pet",
                 },
               ],
@@ -1065,7 +1063,21 @@ test('DocumentReader', () => {
           },
           "response": {
             "body": {
-              "children": [],
+              "children": [
+                {
+                  "default": undefined,
+                  "deprecated": undefined,
+                  "description": undefined,
+                  "enum": undefined,
+                  "example": undefined,
+                  "format": "int32",
+                  "kind": "origin",
+                  "name": "[key: string]",
+                  "required": true,
+                  "title": undefined,
+                  "type": "number",
+                },
+              ],
               "default": undefined,
               "deprecated": undefined,
               "description": undefined,
@@ -1094,7 +1106,7 @@ test('DocumentReader', () => {
               "origin": "Order",
               "props": [],
               "ref": "#/components/schemas/Order",
-              "root": false,
+              "refAble": false,
               "target": "Order",
             },
             "path": undefined,
@@ -1107,7 +1119,7 @@ test('DocumentReader', () => {
               "origin": "Order",
               "props": [],
               "ref": "#/components/schemas/Order",
-              "root": false,
+              "refAble": false,
               "target": "Order",
             },
           },
@@ -1187,7 +1199,7 @@ test('DocumentReader', () => {
               "origin": "Order",
               "props": [],
               "ref": "#/components/schemas/Order",
-              "root": false,
+              "refAble": false,
               "target": "Order",
             },
           },
@@ -1206,7 +1218,7 @@ test('DocumentReader', () => {
               "origin": "User",
               "props": [],
               "ref": "#/components/schemas/User",
-              "root": false,
+              "refAble": false,
               "target": "User",
             },
             "path": undefined,
@@ -1291,7 +1303,7 @@ test('DocumentReader', () => {
               "origin": "User",
               "props": [],
               "ref": "#/components/schemas/User",
-              "root": false,
+              "refAble": false,
               "target": "User",
             },
           },
@@ -1310,7 +1322,7 @@ test('DocumentReader', () => {
               "origin": "User",
               "props": [],
               "ref": "#/components/schemas/User",
-              "root": false,
+              "refAble": false,
               "target": "User",
             },
             "path": {
@@ -1356,7 +1368,7 @@ test('DocumentReader', () => {
                   "origin": "User",
                   "props": [],
                   "ref": "#/components/schemas/User",
-                  "root": false,
+                  "refAble": false,
                   "target": "User",
                 },
               ],
@@ -1382,7 +1394,7 @@ test('DocumentReader', () => {
               "origin": "User",
               "props": [],
               "ref": "#/components/schemas/User",
-              "root": false,
+              "refAble": false,
               "target": "User",
             },
           },
diff --git a/test/readers/Named.test.ts b/test/readers/Named.test.ts
index 37c223a..048df78 100644
--- a/test/readers/Named.test.ts
+++ b/test/readers/Named.test.ts
@@ -25,7 +25,7 @@ test('named', () => {
   // A -> A!(A2) -> aa!!/1/2 == A -> aa!!/1/2(Aa3)
   const a1 = named.addAlias({
     kind: 'alias',
-    root: true,
+    refAble: true,
     name: 'A',
     ref: '#/components/schemas/A!',
     target: '',
@@ -35,7 +35,7 @@ test('named', () => {
   // A!(A2) -> aa!!/1/2(Aa3)
   const a2 = named.addAlias({
     kind: 'alias',
-    root: true,
+    refAble: true,
     name: 'A2',
     ref: '#/components/schemas/aa!!/1/2',
     target: '',
diff --git a/test/readers/PathsReader.test.ts b/test/readers/PathsReader.test.ts
index a748a84..3c97f22 100644
--- a/test/readers/PathsReader.test.ts
+++ b/test/readers/PathsReader.test.ts
@@ -136,7 +136,7 @@ test('resp ref', () => {
       response: {
         body: {
           kind: 'alias',
-          root: false,
+          refAble: false,
           name: 'FindPetResData',
           target: 'T',
           origin: 'T',
@@ -292,9 +292,7 @@ test('req file', () => {
           name: 'FindPetReqData',
           origin: 'Blob',
           props: [],
-          ref: '',
-          required: true,
-          root: false,
+          refAble: false,
           target: 'Blob',
         },
       },
@@ -370,7 +368,7 @@ test('req query + path', () => {
           children: [
             {
               kind: 'alias',
-              root: false,
+              refAble: false,
               name: 'name',
               ref: '#/components/schemas/O/p',
               target: 'O',