diff --git a/VERSION b/VERSION
index 5f8175f..24ca32d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-VERSION=1.2.76
+VERSION=1.2.77
diff --git a/backend/app/models/models.py b/backend/app/models/models.py
index 387f670..f218c60 100644
--- a/backend/app/models/models.py
+++ b/backend/app/models/models.py
@@ -44,7 +44,8 @@ class User(Base):
     f99_100_points = Column(Integer, default=0)  # 积分
     f01_11_balance = Column(Float, default=0)  # 余额
     f01_12_total_amount = Column(Float, default=0)  # 累计金额
-    f01_13_invite_code = Column(String(20), nullable=True)  # 邀请码
+    f01_13_invite_code = Column(String(20), nullable=True)  # 邀请码（自己的邀请码）
+    f99_101_invited_count = Column(Integer, default=0)  # 通过自己邀请码注册的用户数量
 
     collections = relationship("Collection", back_populates="user", cascade="all, delete-orphan")
     operations = relationship("Operation", back_populates="user", cascade="all, delete-orphan")
diff --git a/backend/app/routers/auth.py b/backend/app/routers/auth.py
index ccf1ba6..7cae222 100644
--- a/backend/app/routers/auth.py
+++ b/backend/app/routers/auth.py
@@ -55,6 +55,17 @@ def register(user_data: UserCreate, db: Session = Depends(get_db)):
                 detail="E00041:该邮箱已被注册，请更换邮箱"
             )
     
+    # 处理邀请码
+    invited_by_user = None
+    if user_data.invite_code:
+        # 查找邀请人
+        invited_by_user = db.query(User).filter(User.user_code == user_data.invite_code).first()
+        if not invited_by_user:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="E00042:邀请码无效"
+            )
+    
     # 创建用户
     import uuid
     hashed_password = get_password_hash(user_data.password)
@@ -73,6 +84,18 @@ def register(user_data: UserCreate, db: Session = Depends(get_db)):
     )
     
     db.add(user)
+    db.flush()  # 确保获取user ID
+    
+    # 更新邀请人、被邀请人的关联关系
+    if invited_by_user:
+        # 邀请人的邀请码（创建后生成自己的邀请码）
+        user.f01_13_invite_code = invited_by_user.user_code
+        # 增加邀请人的邀请计数
+        invited_by_user.f99_101_invited_count = (invited_by_user.f99_101_invited_count or 0) + 1
+    
+    # 生成自己的邀请码（用自己的user_code）
+    user.f01_13_invite_code = user.user_code
+    
     db.commit()
     db.refresh(user)
     
diff --git a/backend/app/schemas/schemas.py b/backend/app/schemas/schemas.py
index fe79fe6..a8497b5 100644
--- a/backend/app/schemas/schemas.py
+++ b/backend/app/schemas/schemas.py
@@ -19,6 +19,7 @@ class UserBase(BaseModel):
 
 class UserCreate(UserBase):
     password: str = Field(..., min_length=6)
+    invite_code: Optional[str] = Field(None, alias="inviteCode")  # 填写的邀请码（选填）
 
 
 class UserUpdate(BaseModel):
@@ -50,6 +51,7 @@ class UserResponse(UserBase):
     f01_11_balance: Optional[float] = Field(0, alias="balance")
     f01_12_total_amount: Optional[float] = Field(0, alias="totalAmount")
     f01_13_invite_code: Optional[str] = Field(None, alias="inviteCode")
+    f99_101_invited_count: Optional[int] = Field(0, alias="invitedCount")
     f99_90_id: str = Field(..., alias="id")
     f01_01_name: str = Field(..., alias="username")
     role: str
diff --git a/frontend/src/pages/Login.jsx b/frontend/src/pages/Login.jsx
index 47f3198..8c8dfc1 100644
--- a/frontend/src/pages/Login.jsx
+++ b/frontend/src/pages/Login.jsx
@@ -18,7 +18,8 @@ export default function Login() {
     confirmPassword: '', 
     email: '',
     phone: '',
-    verifyCode: ''
+    verifyCode: '',
+    inviteCode: ''
   })
   const [registerLoading, setRegisterLoading] = useState(false)
   const [registerError, setRegisterError] = useState('')
@@ -148,6 +149,9 @@ export default function Login() {
       if (registerData.email) {
         payload.email = registerData.email
       }
+      if (registerData.inviteCode) {
+        payload.inviteCode = registerData.inviteCode
+      }
       
       const res = await fetch('/api/auth/register', {
         method: 'POST',
@@ -165,7 +169,7 @@ export default function Login() {
       
       alert('注册成功！请登录')
       setShowRegister(false)
-      setRegisterData({ username: '', password: '', confirmPassword: '', email: '', phone: '', verifyCode: '' })
+      setRegisterData({ username: '', password: '', confirmPassword: '', email: '', phone: '', verifyCode: '', inviteCode: '' })
       setCodeSent(false)
       setCodeCountdown(0)
       generateCaptcha()
@@ -584,7 +588,7 @@ export default function Login() {
             </div>
 
             {/* 确认密码 */}
-            <div style={{ marginBottom: '24px' }}>
+            <div style={{ marginBottom: '16px' }}>
               <input
                 type="password"
                 value={registerData.confirmPassword}
@@ -603,6 +607,26 @@ export default function Login() {
               />
             </div>
 
+            {/* 邀请码（选填） */}
+            <div style={{ marginBottom: '24px' }}>
+              <input
+                type="text"
+                value={registerData.inviteCode}
+                onChange={(e) => setRegisterData(prev => ({ ...prev, inviteCode: e.target.value }))}
+                placeholder="邀请码（选填）"
+                style={{
+                  width: '100%',
+                  padding: '14px',
+                  borderRadius: '8px',
+                  border: '1px solid rgba(255,255,255,0.2)',
+                  background: 'rgba(255,255,255,0.05)',
+                  color: '#fff',
+                  fontSize: '16px',
+                  outline: 'none'
+                }}
+              />
+            </div>
+
 
             {/* 用户协议勾选 */}
             <div style={{ marginBottom: '20px', display: 'flex', alignItems: 'flex-start', gap: '8px' }}>
@@ -626,7 +650,7 @@ export default function Login() {
               <button
                 onClick={() => {
                   setShowRegister(false)
-                  setRegisterData({ username: '', password: '', confirmPassword: '', email: '', phone: '', verifyCode: '' })
+                  setRegisterData({ username: '', password: '', confirmPassword: '', email: '', phone: '', verifyCode: '', inviteCode: '' })
                   setRegisterError('')
                   setCodeSent(false)
                   setCodeCountdown(0)