diff --git a/src/adapter.ts b/src/adapter.ts
index d6d62b5..03bb2d3 100644
--- a/src/adapter.ts
+++ b/src/adapter.ts
@@ -4,8 +4,8 @@ import {
   isPlainObject,
   isString,
   isUndefined,
-} from './helpers/is';
-import { assert, throwError } from './helpers/utils';
+} from './helpers/isTypes';
+import { assert, throwError } from './helpers/error';
 import {
   AxiosProgressCallback,
   AxiosRequestFormData,
@@ -53,7 +53,11 @@ export interface AxiosAdapterRequestConfig extends AnyObject {
    */
   method: AxiosAdapterRequestMethod;
   /**
-   * 请求的数据
+   * 请求参数
+   */
+  params?: AnyObject;
+  /**
+   * 请求数据
    */
   data?: AnyObject;
   /**
diff --git a/src/axios.ts b/src/axios.ts
index 3b0a13c..9874aa5 100644
--- a/src/axios.ts
+++ b/src/axios.ts
@@ -7,7 +7,7 @@ import Axios, {
 } from './core/Axios';
 import { CancelToken, CancelTokenConstructor, isCancel } from './core/cancel';
 import { mergeConfig } from './core/mergeConfig';
-import { isString } from './helpers/is';
+import { isString } from './helpers/isTypes';
 import defaults from './defaults';
 
 export interface AxiosInstance extends Axios {
@@ -19,7 +19,9 @@ export interface AxiosInstance extends Axios {
 
 export interface AxiosStatic extends AxiosInstance {
   Axios: AxiosConstructor;
-  defaults: AxiosRequestConfig & { headers: Required<AxiosRequestHeaders> };
+  defaults: AxiosRequestConfig & {
+    headers: Required<AxiosRequestHeaders> & { common?: AnyObject };
+  };
   CancelToken: CancelTokenConstructor;
   create(defaults?: AxiosRequestConfig): AxiosInstance;
   createAdapter(platform: AxiosPlatform): AxiosAdapter;
diff --git a/src/core/Axios.ts b/src/core/Axios.ts
index 4a8a208..b8ec38c 100644
--- a/src/core/Axios.ts
+++ b/src/core/Axios.ts
@@ -1,4 +1,4 @@
-import { buildURL } from '../helpers/url';
+import { buildURL } from '../helpers/buildURL';
 import { mergeConfig } from './mergeConfig';
 import {
   AxiosAdapter,
diff --git a/src/core/dispatchRequest.ts b/src/core/dispatchRequest.ts
index 6c7fd64..20ac484 100644
--- a/src/core/dispatchRequest.ts
+++ b/src/core/dispatchRequest.ts
@@ -1,4 +1,4 @@
-import { isPlainObject } from '../helpers/is';
+import { isPlainObject } from '../helpers/isTypes';
 import { isCancel } from './cancel';
 import { flattenHeaders } from './flattenHeaders';
 import { transformData } from './transformData';
diff --git a/src/core/flattenHeaders.ts b/src/core/flattenHeaders.ts
index 2b1f6e2..74a7f1b 100644
--- a/src/core/flattenHeaders.ts
+++ b/src/core/flattenHeaders.ts
@@ -1,5 +1,5 @@
-import { isPlainObject } from '../helpers/is';
-import { omit } from '../helpers/utils';
+import { isPlainObject } from '../helpers/isTypes';
+import { omit } from '../helpers/omit';
 import { AxiosRequestConfig, AxiosRequestHeaders } from './Axios';
 
 export function flattenHeaders(
diff --git a/src/core/mergeConfig.ts b/src/core/mergeConfig.ts
index 5d47d32..fd814d1 100644
--- a/src/core/mergeConfig.ts
+++ b/src/core/mergeConfig.ts
@@ -1,5 +1,5 @@
-import { isUndefined, isPlainObject } from '../helpers/is';
-import { deepMerge } from '../helpers/utils';
+import { isUndefined, isPlainObject } from '../helpers/isTypes';
+import { deepMerge } from '../helpers/deepMerge';
 import { AxiosRequestConfig } from './Axios';
 
 type AxiosRequestConfigKey = keyof AxiosRequestConfig;
diff --git a/src/core/request.ts b/src/core/request.ts
index fe4bf29..7209264 100644
--- a/src/core/request.ts
+++ b/src/core/request.ts
@@ -1,5 +1,5 @@
-import { isFunction, isPlainObject } from '../helpers/is';
-import { assert } from '../helpers/utils';
+import { isFunction, isPlainObject } from '../helpers/isTypes';
+import { assert } from '../helpers/error';
 import {
   AxiosAdapterRequestConfig,
   AxiosAdapterRequestMethod,
@@ -19,16 +19,17 @@ function tryToggleProgressUpdate(
   adapterConfig: AxiosAdapterRequestConfig,
   progressUpdate?: (callback: AxiosProgressCallback) => void,
 ) {
+  const { onUploadProgress, onDownloadProgress } = adapterConfig;
   if (isFunction(progressUpdate)) {
     switch (adapterConfig.type) {
       case 'upload':
-        if (isFunction(adapterConfig.onUploadProgress)) {
-          progressUpdate(adapterConfig.onUploadProgress);
+        if (isFunction(onUploadProgress)) {
+          progressUpdate(onUploadProgress);
         }
         break;
       case 'download':
-        if (isFunction(adapterConfig.onDownloadProgress)) {
-          progressUpdate(adapterConfig.onDownloadProgress);
+        if (isFunction(onDownloadProgress)) {
+          progressUpdate(onDownloadProgress);
         }
         break;
       default:
diff --git a/src/core/transformData.ts b/src/core/transformData.ts
index ba0d85c..0091ddd 100644
--- a/src/core/transformData.ts
+++ b/src/core/transformData.ts
@@ -1,4 +1,4 @@
-import { isArray, isUndefined } from '../helpers/is';
+import { isArray, isUndefined } from '../helpers/isTypes';
 import { AxiosRequestFormData } from './Axios';
 
 export interface AxiosTransformer {
diff --git a/src/core/transformURL.ts b/src/core/transformURL.ts
index 0354846..b3c8bcd 100644
--- a/src/core/transformURL.ts
+++ b/src/core/transformURL.ts
@@ -1,18 +1,13 @@
-import {
-  buildURL,
-  combineURL,
-  dynamicInterpolation,
-  isAbsoluteURL,
-  isDynamicURL,
-} from '../helpers/url';
+import { buildURL } from '../helpers/buildURL';
+import { combineURL } from '../helpers/combineURL';
+import { dynamicInterpolation, isDynamicURL } from '../helpers/dynamicURL';
+import { isAbsoluteURL } from '../helpers/isAbsoluteURL';
 import { AxiosRequestConfig } from './Axios';
 
 export function transformURL(config: AxiosRequestConfig): string {
   let url = config.url ?? '';
 
-  if (!isAbsoluteURL(url)) {
-    url = combineURL(config.baseURL, url);
-  }
+  if (!isAbsoluteURL(url)) url = combineURL(config.baseURL, url);
 
   if (isDynamicURL(url)) {
     const sourceData = Object.assign({}, config.params, config.data);
diff --git a/src/helpers/url.ts b/src/helpers/buildURL.ts
similarity index 67%
rename from src/helpers/url.ts
rename to src/helpers/buildURL.ts
index e7be263..be8378b 100644
--- a/src/helpers/url.ts
+++ b/src/helpers/buildURL.ts
@@ -1,15 +1,4 @@
-import { isDate, isNull, isPlainObject, isUndefined } from './is';
-
-function encode(str: string): string {
-  return encodeURIComponent(str)
-    .replace(/%40/gi, '@')
-    .replace(/%3A/gi, ':')
-    .replace(/%24/g, '$')
-    .replace(/%2C/gi, ',')
-    .replace(/%20/g, '+')
-    .replace(/%5B/gi, '[')
-    .replace(/%5D/gi, ']');
-}
+import { isDate, isNull, isPlainObject, isUndefined } from './isTypes';
 
 export function buildURL(
   url = '',
@@ -23,38 +12,6 @@ export function buildURL(
   return generateURL(url, paramsSerializer(params));
 }
 
-const combineREG = /([^:])\/{2,}/g;
-export function combineURL(baseURL = '', url: string): string {
-  const separator = '/';
-  const replaceStr = `$1${separator}`;
-
-  return `${baseURL}${separator}${url}`.replace(combineREG, replaceStr);
-}
-
-const dynamicREG = /\/?(:([a-zA-Z_$][\w-$]*))\/??/g;
-export function dynamicInterpolation(
-  url: string,
-  sourceData?: unknown,
-): string {
-  if (!isPlainObject(sourceData)) {
-    return url;
-  }
-
-  return url.replace(dynamicREG, ($1, $2, $3) =>
-    $1.replace($2, sourceData[$3]),
-  );
-}
-
-const absoluteREG = /^([a-z][a-z\d+\-.]*:)?\/\//i;
-export function isAbsoluteURL(url: string): boolean {
-  return absoluteREG.test(url);
-}
-
-export function isDynamicURL(url: string): boolean {
-  dynamicREG.lastIndex = 0;
-  return dynamicREG.test(url);
-}
-
 function generateURL(url: string, serializedParams: string): string {
   const hashIndex = url.indexOf('#');
 
@@ -106,3 +63,14 @@ function paramsSerialization(params?: AnyObject): string {
 
   return parts.join('&');
 }
+
+function encode(str: string): string {
+  return encodeURIComponent(str)
+    .replace(/%40/gi, '@')
+    .replace(/%3A/gi, ':')
+    .replace(/%24/g, '$')
+    .replace(/%2C/gi, ',')
+    .replace(/%20/g, '+')
+    .replace(/%5B/gi, '[')
+    .replace(/%5D/gi, ']');
+}
diff --git a/src/helpers/combineURL.ts b/src/helpers/combineURL.ts
new file mode 100644
index 0000000..5ebeb68
--- /dev/null
+++ b/src/helpers/combineURL.ts
@@ -0,0 +1,7 @@
+const combineREG = /([^:])\/{2,}/g;
+export function combineURL(baseURL = '', url: string): string {
+  const separator = '/';
+  const replaceStr = `$1${separator}`;
+
+  return `${baseURL}${separator}${url}`.replace(combineREG, replaceStr);
+}
diff --git a/src/helpers/deepMerge.ts b/src/helpers/deepMerge.ts
new file mode 100644
index 0000000..4ecd4f3
--- /dev/null
+++ b/src/helpers/deepMerge.ts
@@ -0,0 +1,22 @@
+import { isPlainObject } from './isTypes';
+
+export function deepMerge<T extends AnyObject>(...objs: T[]): T {
+  const result: AnyObject = {};
+
+  objs.forEach((obj: AnyObject) =>
+    Object.keys(obj).forEach((key) => {
+      const val = obj[key];
+      const resultVal = result[key];
+
+      if (isPlainObject(resultVal) && isPlainObject(val)) {
+        result[key] = deepMerge(resultVal, val);
+      } else if (isPlainObject(val)) {
+        result[key] = deepMerge(val);
+      } else {
+        result[key] = val;
+      }
+    }),
+  );
+
+  return result as T;
+}
diff --git a/src/helpers/dynamicURL.ts b/src/helpers/dynamicURL.ts
new file mode 100644
index 0000000..dec0166
--- /dev/null
+++ b/src/helpers/dynamicURL.ts
@@ -0,0 +1,21 @@
+import { isPlainObject } from './isTypes';
+
+const dynamicREG = /\/?(:([a-zA-Z_$][\w-$]*))\/??/g;
+
+export function dynamicInterpolation(
+  url: string,
+  sourceData?: unknown,
+): string {
+  if (!isPlainObject(sourceData)) {
+    return url;
+  }
+
+  return url.replace(dynamicREG, ($1, $2, $3) =>
+    $1.replace($2, sourceData[$3]),
+  );
+}
+
+export function isDynamicURL(url: string): boolean {
+  dynamicREG.lastIndex = 0;
+  return dynamicREG.test(url);
+}
diff --git a/src/helpers/error.ts b/src/helpers/error.ts
new file mode 100644
index 0000000..f8ba1ff
--- /dev/null
+++ b/src/helpers/error.ts
@@ -0,0 +1,9 @@
+export function assert(condition: boolean, msg: string) {
+  if (!condition) {
+    throwError(msg);
+  }
+}
+
+export function throwError(msg: string): void {
+  throw new Error(`[axios-miniprogram]: ${msg}`);
+}
diff --git a/src/helpers/isAbsoluteURL.ts b/src/helpers/isAbsoluteURL.ts
new file mode 100644
index 0000000..b244389
--- /dev/null
+++ b/src/helpers/isAbsoluteURL.ts
@@ -0,0 +1,4 @@
+const absoluteREG = /^([a-z][a-z\d+\-.]*:)?\/\//i;
+export function isAbsoluteURL(url: string): boolean {
+  return absoluteREG.test(url);
+}
diff --git a/src/helpers/is.ts b/src/helpers/isTypes.ts
similarity index 100%
rename from src/helpers/is.ts
rename to src/helpers/isTypes.ts
diff --git a/src/helpers/omit.ts b/src/helpers/omit.ts
new file mode 100644
index 0000000..5f18be6
--- /dev/null
+++ b/src/helpers/omit.ts
@@ -0,0 +1,8 @@
+export function omit<T extends AnyObject, K extends keyof T>(
+  obj: T,
+  ...keys: K[]
+): Omit<T, K> {
+  const res = { ...obj };
+  keys.forEach((key: K) => delete res[key]);
+  return res;
+}
diff --git a/src/helpers/utils.ts b/src/helpers/utils.ts
deleted file mode 100644
index debc9cf..0000000
--- a/src/helpers/utils.ts
+++ /dev/null
@@ -1,54 +0,0 @@
-import { isPlainObject } from './is';
-
-export function deepMerge<T extends AnyObject>(...objs: T[]): T {
-  const result: AnyObject = {};
-
-  objs.forEach((obj: AnyObject) =>
-    Object.keys(obj).forEach((key) => {
-      const val = obj[key];
-      const resultVal = result[key];
-
-      if (isPlainObject(resultVal) && isPlainObject(val)) {
-        result[key] = deepMerge(resultVal, val);
-      } else if (isPlainObject(val)) {
-        result[key] = deepMerge(val);
-      } else {
-        result[key] = val;
-      }
-    }),
-  );
-
-  return result as T;
-}
-
-export function pick<T extends AnyObject, K extends keyof T>(
-  obj: T,
-  ...keys: K[]
-): Pick<T, K> {
-  const _pick: Partial<T> = {};
-
-  keys.forEach((key: K) => (_pick[key] = obj[key]));
-
-  return _pick as Pick<T, K>;
-}
-
-export function omit<T extends AnyObject, K extends keyof T>(
-  obj: T,
-  ...keys: K[]
-): Omit<T, K> {
-  const _omit = Object.assign({}, obj);
-
-  keys.forEach((key: K) => delete _omit[key]);
-
-  return _omit;
-}
-
-export function assert(condition: boolean, msg: string) {
-  if (!condition) {
-    throwError(msg);
-  }
-}
-
-export function throwError(msg: string): void {
-  throw new Error(`[axios-miniprogram]: ${msg}`);
-}
diff --git a/test/helpers/error.test.ts b/test/helpers/error.test.ts
new file mode 100644
index 0000000..6a6f30d
--- /dev/null
+++ b/test/helpers/error.test.ts
@@ -0,0 +1,19 @@
+import { describe, test, expect } from 'vitest';
+import { assert, throwError } from '../../src/helpers/error';
+
+describe('测试 src/helpers/error.ts', () => {
+  test('第一个参数为 true 时应该无事发生', () => {
+    expect(assert(true, '')).toBeUndefined();
+  });
+
+  test('第一个参数为 false 时应该抛出异常', () => {
+    expect(() => assert(false, '')).toThrowError();
+  });
+
+  test('应该抛出异常', () => {
+    expect(() => throwError('')).toThrowError('[axios-miniprogram]: ');
+    expect(() => throwError('error')).toThrowError(
+      '[axios-miniprogram]: error',
+    );
+  });
+});
diff --git a/test/helpers/is.test.ts b/test/helpers/is.test.ts
deleted file mode 100644
index 549c91b..0000000
--- a/test/helpers/is.test.ts
+++ /dev/null
@@ -1,117 +0,0 @@
-import { describe, test, expect } from 'vitest';
-import {
-  isArray,
-  isDate,
-  isEmptyArray,
-  isEmptyObject,
-  isFunction,
-  isNull,
-  isPlainObject,
-  isString,
-  isUndefined,
-} from '../../src/helpers/is';
-
-describe('对 src/helpers/is.ts 进行测试', () => {
-  test('传入数组应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isArray([0])).toBe(true);
-    expect(isArray([])).toBe(true);
-    expect(isArray({})).toBe(false);
-    expect(isArray(0)).toBe(false);
-    expect(isArray('')).toBe(false);
-    expect(isArray(undefined)).toBe(false);
-    expect(isArray(null)).toBe(false);
-  });
-
-  test('传入 Date 实例应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isDate(new Date())).toBe(true);
-    expect(isDate({})).toBe(false);
-    expect(isDate([])).toBe(false);
-    expect(isDate(0)).toBe(false);
-    expect(isDate('')).toBe(false);
-    expect(isDate(undefined)).toBe(false);
-    expect(isDate(null)).toBe(false);
-  });
-
-  test('传入空数组应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isEmptyArray([])).toBe(true);
-    expect(isEmptyArray([0])).toBe(false);
-    expect(isEmptyArray({})).toBe(false);
-    expect(isEmptyArray(0)).toBe(false);
-    expect(isEmptyArray('')).toBe(false);
-    expect(isEmptyArray(undefined)).toBe(false);
-    expect(isEmptyArray(null)).toBe(false);
-  });
-
-  test('传入空对象应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isEmptyObject({})).toBe(true);
-    expect(isEmptyObject({ a: 0 })).toBe(false);
-    expect(isEmptyObject([0])).toBe(false);
-    expect(isEmptyObject([])).toBe(false);
-    expect(isEmptyObject(0)).toBe(false);
-    expect(isEmptyObject('')).toBe(false);
-    expect(isEmptyObject(undefined)).toBe(false);
-    expect(isEmptyObject(null)).toBe(false);
-  });
-
-  test('传入空函数应该返回 true，其他参数应该返回 fasle', () => {
-    expect(
-      isFunction(() => {
-        return;
-      }),
-    ).toBe(true);
-    expect(
-      isFunction(function () {
-        return;
-      }),
-    ).toBe(true);
-    expect(isFunction({})).toBe(false);
-    expect(isFunction([])).toBe(false);
-    expect(isFunction(0)).toBe(false);
-    expect(isFunction('')).toBe(false);
-    expect(isFunction(undefined)).toBe(false);
-    expect(isFunction(null)).toBe(false);
-  });
-
-  test('传入空 null 应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isNull(null)).toBe(true);
-    expect(isNull({ a: 0 })).toBe(false);
-    expect(isNull([0])).toBe(false);
-    expect(isNull([])).toBe(false);
-    expect(isNull(0)).toBe(false);
-    expect(isNull('')).toBe(false);
-    expect(isNull(undefined)).toBe(false);
-  });
-
-  test('传入普通对象应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isPlainObject({})).toBe(true);
-    expect(isPlainObject({ a: 0 })).toBe(true);
-    expect(isPlainObject([0])).toBe(false);
-    expect(isPlainObject([])).toBe(false);
-    expect(isPlainObject(0)).toBe(false);
-    expect(isPlainObject('')).toBe(false);
-    expect(isPlainObject(undefined)).toBe(false);
-    expect(isPlainObject(null)).toBe(false);
-  });
-
-  test('传入字符串应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isString('')).toBe(true);
-    expect(isString({})).toBe(false);
-    expect(isString({ a: 0 })).toBe(false);
-    expect(isString([0])).toBe(false);
-    expect(isString([])).toBe(false);
-    expect(isString(0)).toBe(false);
-    expect(isString(undefined)).toBe(false);
-    expect(isString(null)).toBe(false);
-  });
-
-  test('传入 undefined 应该返回 true，其他参数应该返回 fasle', () => {
-    expect(isUndefined(undefined)).toBe(true);
-    expect(isUndefined('')).toBe(false);
-    expect(isUndefined({})).toBe(false);
-    expect(isUndefined({ a: 0 })).toBe(false);
-    expect(isUndefined([0])).toBe(false);
-    expect(isUndefined([])).toBe(false);
-    expect(isUndefined(0)).toBe(false);
-    expect(isUndefined(null)).toBe(false);
-  });
-});
diff --git a/test/helpers/utils.test.ts b/test/helpers/utils.test.ts
deleted file mode 100644
index 8f6f183..0000000
--- a/test/helpers/utils.test.ts
+++ /dev/null
@@ -1,50 +0,0 @@
-import { describe, test, expect } from 'vitest';
-import {
-  assert,
-  deepMerge,
-  omit,
-  pick,
-  throwError,
-} from '../../src/helpers/utils';
-
-describe('对 src/helpers/utils.ts 进行测试', () => {
-  test('测试 assert() 是否符合预期', () => {
-    expect(assert(true, '')).toBeUndefined();
-    expect(() => assert(false, '')).toThrow();
-    expect(() => assert(false, 'msg')).toThrowError('[axios-miniprogram]: msg');
-  });
-
-  test('测试 deepMerge() 是否符合预期', () => {
-    expect(deepMerge({})).toEqual({});
-    expect(deepMerge({ a: 1 }, { b: 2 })).toEqual({ a: 1, b: 2 });
-    expect(deepMerge({ a: { a: 1 } }, { a: { b: 2 } })).toEqual({
-      a: { a: 1, b: 2 },
-    });
-    expect(deepMerge({ a: { a: 1, b: 1 } }, { a: { a: 2, b: 2 } })).toEqual({
-      a: { a: 2, b: 2 },
-    });
-    expect(deepMerge({ a: { a: 1 } }, { a: 2 })).toEqual({
-      a: 2,
-    });
-  });
-
-  test('测试 omit() 是否符合预期', () => {
-    expect(omit({})).toEqual({});
-    expect(omit({ a: 1, b: 1 }, 'a')).toEqual({ b: 1 });
-    expect(omit({ a: 1, b: 1 }, 'a', 'b')).toEqual({});
-  });
-
-  test('测试 pick() 是否符合预期', () => {
-    expect(pick({})).toEqual({});
-    expect(pick({ a: 1, b: 1 }, 'a')).toEqual({ a: 1 });
-    expect(pick({ a: 1, b: 1 }, 'a', 'b')).toEqual({ a: 1, b: 1 });
-  });
-
-  test('测试 throwError() 是否符合预期', () => {
-    expect(() => throwError('')).toThrowError('[axios-miniprogram]: ');
-    expect(() => throwError('msg')).toThrowError('[axios-miniprogram]: msg');
-    expect(() => throwError(' msg ')).toThrowError(
-      '[axios-miniprogram]:  msg ',
-    );
-  });
-});