diff --git a/docs/config/common.md b/docs/config/common.md
index eefb8d4..6088ef4 100644
--- a/docs/config/common.md
+++ b/docs/config/common.md
@@ -117,6 +117,7 @@ export default {
 ::: tip
 * 如果想要发送二进制数据可以参阅 [FormData](../guide/form-data.md#formdata) 章节
 * 如果请求头上的一些数据是异步获取到的，比如小程序端的 `cookie`。建议配置下面的 `beforeFn` 函数或是中间件，异步设置请求头。
+* <badge text="1.5.0+" /> 若当前以 `post` 的方式发送请求，且当前没有配置 `transformRequest` 时，`tua-api` 会自动调用 `JSON.stringify`，并设置 `Content-Type` 为 `'application/json'`。
 :::
 
 ## beforeFn 发起请求前钩子函数
diff --git a/examples/apis-web/fake-post.js b/examples/apis-web/fake-post.js
index afd0985..b3dd0e1 100644
--- a/examples/apis-web/fake-post.js
+++ b/examples/apis-web/fake-post.js
@@ -71,5 +71,22 @@ export default {
             // 表示这个接口不需要传递 commonParams
             commonParams: null,
         },
+        /**
+         * custom-transformRequest
+         */
+        {
+            name: 'ct',
+            path: 'custom-transformRequest',
+            axiosOptions: {
+                transformRequest: () => `ct`,
+            },
+        },
+        /**
+         * application/json
+         */
+        {
+            name: 'pj',
+            path: 'post-json',
+        },
     ],
 }
diff --git a/examples/apis-web/index.d.ts b/examples/apis-web/index.d.ts
index 0bf97be..05b830f 100644
--- a/examples/apis-web/index.d.ts
+++ b/examples/apis-web/index.d.ts
@@ -40,7 +40,9 @@ export const fakeGetApi: {
 }
 
 export const fakePostApi: {
+	'ct': ReqFnWithAnyParams
 	'oh': ReqFnWithAnyParams
+	'pj': ReqFnWithAnyParams
 	'eap': ReqFnWithAnyParams
 	'hap': ReqFnWithAnyParams
 	'ap': ReqFn & {
diff --git a/package.json b/package.json
index 782f791..62d9352 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "tua-api",
-    "version": "1.4.4",
+    "version": "1.5.0",
     "description": "🏗 A common tool helps converting configs to api functions",
     "main": "dist/TuaApi.cjs.js",
     "module": "dist/TuaApi.esm.js",
diff --git a/src/adapters/axios.js b/src/adapters/axios.js
index 4fcddb2..6a51895 100644
--- a/src/adapters/axios.js
+++ b/src/adapters/axios.js
@@ -1,7 +1,7 @@
 import axios from 'axios'
 
 import { DEFAULT_HEADER } from '../constants'
-import { logger, isFormData, getParamStrFromObj } from '../utils'
+import { logger, isFormData, isUndefined, getParamStrFromObj } from '../utils'
 
 /**
  * 获取使用 axios 发起请求后的 promise 对象
@@ -11,20 +11,34 @@ export const getAxiosPromise = ({
     url,
     data,
     method,
-    headers = DEFAULT_HEADER,
+    headers,
     crossDomain = true,
     withCredentials = true,
-    transformRequest = [getParamStrFromObj],
+    transformRequest,
     ...rest
 }) => {
     const isFD = isFormData(data)
+    const isPost = method.toLowerCase() === 'post'
 
     logger.log(`Req Url: ${url}`)
     if (data && (Object.keys(data).length || isFD)) {
         logger.log('Req Data:', data)
     }
 
-    transformRequest = isFD ? null : transformRequest
+    // 优先使用用户的配置
+    if (isUndefined(transformRequest)) {
+        transformRequest = isFD
+            ? null
+            : isPost
+                // 如果使用 post 的请求方式，自动对其 stringify
+                ? x => JSON.stringify(x)
+                : getParamStrFromObj
+    }
+    if (isUndefined(headers)) {
+        headers = isPost
+            ? { 'Content-Type': 'application/json;charset=utf-8' }
+            : DEFAULT_HEADER
+    }
 
     return axios({
         url,
diff --git a/src/constants.js b/src/constants.js
index 9cf3716..e690976 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -5,7 +5,7 @@ const VALID_REQ_TYPES = ['wx', 'axios', 'jsonp']
 const WX_VALID_METHODS = ['OPTIONS', 'GET', 'HEAD', 'POST', 'PUT', 'DELETE', 'TRACE', 'CONNECT']
 
 // 默认请求头
-const DEFAULT_HEADER = { 'Content-Type': 'application/x-www-form-urlencoded' }
+const DEFAULT_HEADER = { 'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8' }
 
 // 错误信息
 const ERROR_STRINGS = {
diff --git a/src/utils/judge.js b/src/utils/judge.js
index ba9f021..0274f58 100644
--- a/src/utils/judge.js
+++ b/src/utils/judge.js
@@ -7,3 +7,5 @@ export const isFormData = (val) => (
     (typeof FormData !== 'undefined') &&
     (val instanceof FormData)
 )
+
+export const isUndefined = val => typeof val === 'undefined'
diff --git a/test/__tests__/axios.test.js b/test/__tests__/axios.test.js
index 693b254..e8fc981 100644
--- a/test/__tests__/axios.test.js
+++ b/test/__tests__/axios.test.js
@@ -1,6 +1,7 @@
 import axios from 'axios'
 import MockAdapter from 'axios-mock-adapter'
 
+import fakePostConfig from '@examples/apis-web/fake-post'
 import { ERROR_STRINGS } from '@/constants'
 import { fakeGetApi, fakePostApi } from '@examples/apis-web/'
 
@@ -19,6 +20,8 @@ const reqTAUrl = 'http://example-base.com/fake-get/req-type-axios?asyncCp=asyncC
 const reqEAPUrl = 'http://example-base.com/fake-post/empty-array-params'
 const reqMFDUrl = 'http://example-base.com/fake-get/mock-function-data'
 const reqBFCUrl = 'http://example-base.com/fake-get/beforeFn-cookie'
+const reqCTUrl = 'http://example-base.com/fake-post/custom-transformRequest'
+const reqPjUrl = 'http://example-base.com/fake-post/post-json'
 
 describe('middleware', () => {
     test('change baseUrl before request', async () => {
@@ -164,4 +167,27 @@ describe('fake post requests', () => {
         expect(data).toBe(formData)
         expect(transformRequest).toBe(null)
     })
+
+    test('custom-transformRequest', async () => {
+        mock.resetHistory()
+        mock.onPost(reqCTUrl).reply(200, {})
+
+        await fakePostApi.ct()
+
+        const { data } = mock.history.post[0]
+
+        expect(data).toBe('ct')
+    })
+
+    test('post-json', async () => {
+        mock.resetHistory()
+        mock.onPost(reqPjUrl).reply(200, {})
+
+        await fakePostApi.pj()
+
+        const { data } = mock.history.post[0]
+
+        expect(data).toBe(JSON.stringify(fakePostConfig.commonParams))
+        expect(mock.history.post[0].headers['Content-Type']).toBe('application/json;charset=utf-8')
+    })
 })