diff --git a/src/main/java/com/yolo/keyborad/common/ErrorCode.java b/src/main/java/com/yolo/keyborad/common/ErrorCode.java
index 39129c1..4cfd434 100644
--- a/src/main/java/com/yolo/keyborad/common/ErrorCode.java
+++ b/src/main/java/com/yolo/keyborad/common/ErrorCode.java
@@ -57,7 +57,12 @@ public enum ErrorCode {
     LACK_ORIGIN_TRANSACTION_ID_ERROR(50019, "缺少原始交易id"),
     UNKNOWN_PRODUCT_TYPE(50020, "未知商品类型"),
     PRODUCT_NOT_FOUND(50021, "商品不存在"),
-    NO_QUOTA_AND_NOT_VIP(50022, "免费次数已用完，请开通VIP");
+    NO_QUOTA_AND_NOT_VIP(50022, "免费次数已用完，请开通VIP"),
+    INVITE_CODE_NOT_FOUND(50023, "邀请码不存在"),
+    INVITE_CODE_INVALID(50024, "邀请码无效"),
+    INVITE_CODE_EXPIRED(50025, "邀请码已过期"),
+    INVITE_CODE_USED_UP(50026, "邀请码使用次数已达上限"),
+    RECEIPT_ALREADY_PROCESSED(50027, "收据已处理");
 
     /**
      * 状态码
diff --git a/src/main/java/com/yolo/keyborad/config/SaTokenConfigure.java b/src/main/java/com/yolo/keyborad/config/SaTokenConfigure.java
index 0d4f7fb..a2645c1 100644
--- a/src/main/java/com/yolo/keyborad/config/SaTokenConfigure.java
+++ b/src/main/java/com/yolo/keyborad/config/SaTokenConfigure.java
@@ -102,7 +102,8 @@ public class SaTokenConfigure implements WebMvcConfigurer {
                 "/purchase/handle",
                 "/apple/notification",
                 "/apple/receipt",
-                "/apple/validate-receipt"
+                "/apple/validate-receipt",
+                "/user/inviteCode"
 
         };
     }
diff --git a/src/main/java/com/yolo/keyborad/mapper/KeyboardUserInvitesMapper.java b/src/main/java/com/yolo/keyborad/mapper/KeyboardUserInvitesMapper.java
new file mode 100644
index 0000000..c8fae89
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/mapper/KeyboardUserInvitesMapper.java
@@ -0,0 +1,12 @@
+package com.yolo.keyborad.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.yolo.keyborad.model.entity.KeyboardUserInvites;
+
+/*
+* @author: ziin
+* @date: 2025/12/19 13:26
+*/
+    
+public interface KeyboardUserInvitesMapper extends BaseMapper<KeyboardUserInvites> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/yolo/keyborad/model/dto/user/UserRegisterDTO.java b/src/main/java/com/yolo/keyborad/model/dto/user/UserRegisterDTO.java
index e0ee6b3..11867aa 100644
--- a/src/main/java/com/yolo/keyborad/model/dto/user/UserRegisterDTO.java
+++ b/src/main/java/com/yolo/keyborad/model/dto/user/UserRegisterDTO.java
@@ -24,4 +24,7 @@ public class UserRegisterDTO {
 
     @Schema(description = "验证码")
     private String verifyCode;
+
+    @Schema(description = "邀请码（可选）")
+    private String inviteCode;
 }
diff --git a/src/main/java/com/yolo/keyborad/model/entity/KeyboardUserInvites.java b/src/main/java/com/yolo/keyborad/model/entity/KeyboardUserInvites.java
new file mode 100644
index 0000000..4b95999
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/model/entity/KeyboardUserInvites.java
@@ -0,0 +1,85 @@
+package com.yolo.keyborad.model.entity;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import io.swagger.v3.oas.annotations.media.Schema;
+import java.util.Date;
+import lombok.Data;
+
+/*
+* @author: ziin
+* @date: 2025/12/19 13:26
+*/
+    
+/**
+ * 用户邀请关系绑定台账表，记录新用户最终归属的邀请人
+ */
+@Schema(description="用户邀请关系绑定台账表，记录新用户最终归属的邀请人")
+@Data
+@TableName(value = "keyboard_user_invites")
+public class KeyboardUserInvites {
+    /**
+     * 邀请绑定记录主键ID
+     */
+    @TableId(value = "id", type = IdType.AUTO)
+    @Schema(description="邀请绑定记录主键ID")
+    private Long id;
+
+    /**
+     * 邀请人用户ID
+     */
+    @TableField(value = "inviter_user_id")
+    @Schema(description="邀请人用户ID")
+    private Long inviterUserId;
+
+    /**
+     * 被邀请人用户ID（新注册用户）
+     */
+    @TableField(value = "invitee_user_id")
+    @Schema(description="被邀请人用户ID（新注册用户）")
+    private Long inviteeUserId;
+
+    /**
+     * 使用的邀请码ID
+     */
+    @TableField(value = "invite_code_id")
+    @Schema(description="使用的邀请码ID")
+    private Long inviteCodeId;
+
+    /**
+     * 绑定时关联的点击Token（通过邀请链接自动绑定时使用）
+     */
+    @TableField(value = "click_token")
+    @Schema(description="绑定时关联的点击Token（通过邀请链接自动绑定时使用）")
+    private String clickToken;
+
+    /**
+     * 绑定方式：1=手动填写邀请码，2=邀请链接自动绑定，3=其他方式
+     */
+    @TableField(value = "bind_type")
+    @Schema(description="绑定方式：1=手动填写邀请码，2=邀请链接自动绑定，3=其他方式")
+    private Short bindType;
+
+    /**
+     * 邀请关系绑定完成时间
+     */
+    @TableField(value = "bound_at")
+    @Schema(description="邀请关系绑定完成时间")
+    private Date boundAt;
+
+    /**
+     * 绑定 iP
+     */
+    @TableField(value = "bind_ip")
+    @Schema(description="绑定 iP")
+    private String bindIp;
+
+    /**
+     * userAgent
+     */
+    @TableField(value = "bind_user_agent")
+    @Schema(description="userAgent")
+    private String bindUserAgent;
+}
\ No newline at end of file
diff --git a/src/main/java/com/yolo/keyborad/service/KeyboardUserInviteCodesService.java b/src/main/java/com/yolo/keyborad/service/KeyboardUserInviteCodesService.java
index 12df1df..95151f3 100644
--- a/src/main/java/com/yolo/keyborad/service/KeyboardUserInviteCodesService.java
+++ b/src/main/java/com/yolo/keyborad/service/KeyboardUserInviteCodesService.java
@@ -23,4 +23,11 @@ public interface KeyboardUserInviteCodesService extends IService<KeyboardUserInv
      */
     KeyboardUserInviteCodes createInviteCode(Long userId);
 
+    /**
+     * 验证邀请码是否有效
+     * @param code 邀请码
+     * @return 邀请码实体，如果无效则抛出异常
+     */
+    KeyboardUserInviteCodes validateInviteCode(String code);
+
 }
diff --git a/src/main/java/com/yolo/keyborad/service/KeyboardUserInvitesService.java b/src/main/java/com/yolo/keyborad/service/KeyboardUserInvitesService.java
new file mode 100644
index 0000000..1b79f4d
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/service/KeyboardUserInvitesService.java
@@ -0,0 +1,13 @@
+package com.yolo.keyborad.service;
+
+import com.yolo.keyborad.model.entity.KeyboardUserInvites;
+import com.baomidou.mybatisplus.extension.service.IService;
+    /*
+* @author: ziin
+* @date: 2025/12/19 13:26
+*/
+    
+public interface KeyboardUserInvitesService extends IService<KeyboardUserInvites>{
+
+
+}
diff --git a/src/main/java/com/yolo/keyborad/service/impl/ApplePurchaseServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/ApplePurchaseServiceImpl.java
index 584d88c..fa414d9 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/ApplePurchaseServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/ApplePurchaseServiceImpl.java
@@ -94,7 +94,7 @@ public class ApplePurchaseServiceImpl implements ApplePurchaseService {
                 .exists();
         if (handled) {
             log.info("Apple purchase already handled, transactionId={}", validationResult.getTransactionId());
-            return;
+            throw new BusinessException(ErrorCode.RECEIPT_ALREADY_PROCESSED);
         }
 
         // 4. 查询商品信息
diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserInviteCodesServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserInviteCodesServiceImpl.java
index 4256c23..f3e05ae 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserInviteCodesServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserInviteCodesServiceImpl.java
@@ -1,6 +1,8 @@
 package com.yolo.keyborad.service.impl;
 
 import cn.hutool.core.util.RandomUtil;
+import com.yolo.keyborad.common.ErrorCode;
+import com.yolo.keyborad.exception.BusinessException;
 import org.springframework.stereotype.Service;
 import org.springframework.beans.factory.annotation.Autowired;
 import java.util.Date;
@@ -63,4 +65,34 @@ public class KeyboardUserInviteCodesServiceImpl extends ServiceImpl<KeyboardUser
 
         return inviteCode;
     }
+
+    @Override
+    public KeyboardUserInviteCodes validateInviteCode(String code) {
+        // 查询邀请码
+        QueryWrapper<KeyboardUserInviteCodes> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("code", code);
+        KeyboardUserInviteCodes inviteCode = this.getOne(queryWrapper);
+
+        // 邀请码不存在
+        if (inviteCode == null) {
+            throw new BusinessException(ErrorCode.INVITE_CODE_NOT_FOUND);
+        }
+
+        // 邀请码已停用
+        if (inviteCode.getStatus() != 1) {
+            throw new BusinessException(ErrorCode.INVITE_CODE_INVALID);
+        }
+
+        // 检查是否过期
+        if (inviteCode.getExpiresAt() != null && inviteCode.getExpiresAt().before(new Date())) {
+            throw new BusinessException(ErrorCode.INVITE_CODE_EXPIRED);
+        }
+
+        // 检查使用次数是否达到上限
+        if (inviteCode.getMaxUses() != null && inviteCode.getUsedCount() >= inviteCode.getMaxUses()) {
+            throw new BusinessException(ErrorCode.INVITE_CODE_USED_UP);
+        }
+
+        return inviteCode;
+    }
 }
diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserInvitesServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserInvitesServiceImpl.java
new file mode 100644
index 0000000..bf8aee8
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserInvitesServiceImpl.java
@@ -0,0 +1,18 @@
+package com.yolo.keyborad.service.impl;
+
+import org.springframework.stereotype.Service;
+import org.springframework.beans.factory.annotation.Autowired;
+import java.util.List;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.yolo.keyborad.model.entity.KeyboardUserInvites;
+import com.yolo.keyborad.mapper.KeyboardUserInvitesMapper;
+import com.yolo.keyborad.service.KeyboardUserInvitesService;
+/*
+* @author: ziin
+* @date: 2025/12/19 13:26
+*/
+    
+@Service
+public class KeyboardUserInvitesServiceImpl extends ServiceImpl<KeyboardUserInvitesMapper, KeyboardUserInvites> implements KeyboardUserInvitesService{
+
+}
diff --git a/src/main/java/com/yolo/keyborad/service/impl/UserServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/UserServiceImpl.java
index 563c9f3..048fd99 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/UserServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/UserServiceImpl.java
@@ -12,9 +12,7 @@ import com.yolo.keyborad.config.NacosAppConfigCenter;
 import com.yolo.keyborad.exception.BusinessException;
 import com.yolo.keyborad.mapper.KeyboardUserMapper;
 import com.yolo.keyborad.model.dto.user.*;
-import com.yolo.keyborad.model.entity.KeyboardUser;
-import com.yolo.keyborad.model.entity.KeyboardUserQuotaTotal;
-import com.yolo.keyborad.model.entity.KeyboardUserWallet;
+import com.yolo.keyborad.model.entity.*;
 import com.yolo.keyborad.model.vo.user.KeyboardUserRespVO;
 import com.yolo.keyborad.service.*;
 import jakarta.servlet.http.HttpServletRequest;
@@ -65,6 +63,12 @@ public class UserServiceImpl extends ServiceImpl<KeyboardUserMapper, KeyboardUse
     @Resource
     private KeyboardUserInviteCodesService inviteCodesService;
 
+    @Resource
+    private KeyboardUserInvitesService userInvitesService;
+
+    @Resource
+    private HttpServletRequest request;
+
     private final NacosAppConfigCenter.DynamicAppConfig cfgHolder;
 
     public UserServiceImpl(NacosAppConfigCenter.DynamicAppConfig cfgHolder) {
@@ -255,6 +259,35 @@ public class UserServiceImpl extends ServiceImpl<KeyboardUserMapper, KeyboardUse
             // 初始化用户邀请码
             inviteCodesService.createInviteCode(keyboardUser.getId());
 
+            // 处理邀请码绑定
+            if (userRegisterDTO.getInviteCode() != null && !userRegisterDTO.getInviteCode().trim().isEmpty()) {
+                try {
+                    // 验证邀请码
+                    KeyboardUserInviteCodes inviteCode = inviteCodesService.validateInviteCode(userRegisterDTO.getInviteCode().trim());
+
+                    // 创建邀请关系绑定记录
+                    KeyboardUserInvites userInvite = new KeyboardUserInvites();
+                    userInvite.setInviterUserId(inviteCode.getOwnerUserId());
+                    userInvite.setInviteeUserId(keyboardUser.getId());
+                    userInvite.setInviteCodeId(inviteCode.getId());
+                    userInvite.setBindType((short) 1); // 1=手动填写邀请码
+                    userInvite.setBoundAt(new Date());
+                    userInvite.setBindIp(request.getRemoteAddr());
+                    userInvite.setBindUserAgent(request.getHeader("User-Agent"));
+                    userInvitesService.save(userInvite);
+
+                    // 更新邀请码使用次数
+                    inviteCode.setUsedCount(inviteCode.getUsedCount() + 1);
+                    inviteCodesService.updateById(inviteCode);
+
+                    log.info("User bound to invite code, userId={}, inviteCodeId={}, inviterUserId={}",
+                            keyboardUser.getId(), inviteCode.getId(), inviteCode.getOwnerUserId());
+                } catch (BusinessException e) {
+                    // 邀请码验证失败，记录日志但不影响注册流程
+                    log.warn("Failed to bind invite code for user {}: {}", keyboardUser.getId(), e.getMessage());
+                }
+            }
+
             log.info("User registered with email, userId={}, email={}, freeQuota={}",
                     keyboardUser.getId(), keyboardUser.getEmail(), appConfig.getUserRegisterProperties().getFreeTrialQuota());
         }
diff --git a/src/main/resources/mapper/KeyboardUserInvitesMapper.xml b/src/main/resources/mapper/KeyboardUserInvitesMapper.xml
new file mode 100644
index 0000000..793c8db
--- /dev/null
+++ b/src/main/resources/mapper/KeyboardUserInvitesMapper.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.yolo.keyborad.mapper.KeyboardUserInvitesMapper">
+  <resultMap id="BaseResultMap" type="com.yolo.keyborad.model.entity.KeyboardUserInvites">
+    <!--@mbg.generated-->
+    <!--@Table keyboard_user_invites-->
+    <id column="id" jdbcType="BIGINT" property="id" />
+    <result column="inviter_user_id" jdbcType="BIGINT" property="inviterUserId" />
+    <result column="invitee_user_id" jdbcType="BIGINT" property="inviteeUserId" />
+    <result column="invite_code_id" jdbcType="BIGINT" property="inviteCodeId" />
+    <result column="click_token" jdbcType="VARCHAR" property="clickToken" />
+    <result column="bind_type" jdbcType="SMALLINT" property="bindType" />
+    <result column="bound_at" jdbcType="TIMESTAMP" property="boundAt" />
+    <result column="bind_ip" jdbcType="VARCHAR" property="bindIp" />
+    <result column="bind_user_agent" jdbcType="VARCHAR" property="bindUserAgent" />
+  </resultMap>
+  <sql id="Base_Column_List">
+    <!--@mbg.generated-->
+    id, inviter_user_id, invitee_user_id, invite_code_id, click_token, bind_type, bound_at, 
+    bind_ip, bind_user_agent
+  </sql>
+</mapper>
\ No newline at end of file