diff --git a/src/modules/auth/api/auth.ts b/src/modules/auth/api/auth.ts
index 564968a..cb3cdec 100644
--- a/src/modules/auth/api/auth.ts
+++ b/src/modules/auth/api/auth.ts
@@ -7,7 +7,7 @@ export interface RegisterMerchantRequest {
   displayName: string
   companyName: string
   legalPerson: string
-  legalPhone: string
+  phone: string
   contactEmail?: string
   countryCode?: string
   address?: string
diff --git a/src/modules/auth/views/AuthViews.test.mjs b/src/modules/auth/views/AuthViews.test.mjs
index a41ff01..6adc8fb 100644
--- a/src/modules/auth/views/AuthViews.test.mjs
+++ b/src/modules/auth/views/AuthViews.test.mjs
@@ -50,10 +50,13 @@ test('persists both rotating tokens according to the remember choice', () => {
 })
 
 test('implements every backend registration field and real submission', () => {
-  for (const field of ['username', 'companyName', 'displayName', 'legalPerson', 'legalPhone', 'contactEmail', 'countryCode', 'address', 'password', 'agreement']) {
+  for (const field of ['username', 'companyName', 'displayName', 'legalPerson', 'phone', 'contactEmail', 'countryCode', 'address', 'password', 'agreement']) {
     assert.match(registerSource, new RegExp(`prop="${field}"`))
   }
-  assert.match(registerSource, /label="登录手机号" prop="legalPhone"/)
+  assert.match(registerSource, /label="登录手机号" prop="phone"/)
+  assert.doesNotMatch(registerSource, /legalPhone/)
+  assert.match(authApiSource, /phone: string/)
+  assert.doesNotMatch(authApiSource, /legalPhone/)
   assert.match(registerSource, /注册时同时初始化公司联系电话；注册后两者可分别修改，互不联动/)
   assert.match(registerSource, /registerMerchant\(/)
   assert.match(registerSource, /4–64 位/)
diff --git a/src/modules/auth/views/RegisterView.vue b/src/modules/auth/views/RegisterView.vue
index 3e683e0..4068b5e 100644
--- a/src/modules/auth/views/RegisterView.vue
+++ b/src/modules/auth/views/RegisterView.vue
@@ -11,7 +11,7 @@ interface RegisterForm {
   companyName: string
   displayName: string
   legalPerson: string
-  legalPhone: string
+  phone: string
   contactEmail: string
   countryCode: string
   address: string
@@ -24,7 +24,7 @@ const formRef = ref<FormInstance>()
 const submitting = ref(false)
 const submitted = ref(false)
 const submittedAt = ref('')
-const form = reactive<RegisterForm>({ username: '', companyName: '', displayName: '', legalPerson: '', legalPhone: '', contactEmail: '', countryCode: 'CN', address: '', password: '', agreement: false })
+const form = reactive<RegisterForm>({ username: '', companyName: '', displayName: '', legalPerson: '', phone: '', contactEmail: '', countryCode: 'CN', address: '', password: '', agreement: false })
 
 const rules: FormRules<RegisterForm> = {
   username: [
@@ -46,7 +46,7 @@ const rules: FormRules<RegisterForm> = {
   contactEmail: [
     { type: 'email', message: '请输入有效的邮箱地址', trigger: 'blur' },
   ],
-  legalPhone: [
+  phone: [
     { required: true, message: '请输入手机号', trigger: 'blur' },
     { pattern: /^1[3-9]\d{9}$/, message: '请输入有效的中国大陆手机号', trigger: 'blur' },
   ],
@@ -74,7 +74,7 @@ async function submit() {
       displayName: form.displayName.trim(),
       companyName: form.companyName.trim(),
       legalPerson: form.legalPerson.trim(),
-      legalPhone: form.legalPhone.trim(),
+      phone: form.phone.trim(),
       contactEmail: form.contactEmail.trim() || undefined,
       countryCode: form.countryCode,
       address: form.address.trim() || undefined,
@@ -131,7 +131,7 @@ async function submit() {
             <h2 id="contact-section-title">联系信息</h2>
             <div class="register-form-grid">
               <el-form-item label="联系人" prop="displayName" required><el-input v-model="form.displayName" maxlength="64" placeholder="请输入联系人姓名" /></el-form-item>
-              <el-form-item label="登录手机号" prop="legalPhone" required><el-input v-model="form.legalPhone" type="tel" autocomplete="tel" inputmode="numeric" maxlength="11" placeholder="请输入 11 位手机号" :prefix-icon="Phone" /><span class="register-security-note">注册时同时初始化公司联系电话；注册后两者可分别修改，互不联动。</span></el-form-item>
+              <el-form-item label="登录手机号" prop="phone" required><el-input v-model="form.phone" type="tel" autocomplete="tel" inputmode="numeric" maxlength="11" placeholder="请输入 11 位手机号" :prefix-icon="Phone" /><span class="register-security-note">注册时同时初始化公司联系电话；注册后两者可分别修改，互不联动。</span></el-form-item>
               <el-form-item label="联系邮箱" prop="contactEmail"><el-input v-model="form.contactEmail" type="email" autocomplete="email" maxlength="128" placeholder="选填，用于接收业务通知" :prefix-icon="Mail" /></el-form-item>
               <el-form-item label="企业地址" prop="address"><el-input v-model="form.address" maxlength="255" placeholder="选填，最多 255 个字符" /></el-form-item>
             </div>