diff --git a/src/main/java/com/yolo/keyborad/controller/AppleReceiptController.java b/src/main/java/com/yolo/keyborad/controller/AppleReceiptController.java
index 63a62ab..c7a25c2 100644
--- a/src/main/java/com/yolo/keyborad/controller/AppleReceiptController.java
+++ b/src/main/java/com/yolo/keyborad/controller/AppleReceiptController.java
@@ -7,6 +7,7 @@ import com.yolo.keyborad.common.ResultUtils;
 import com.yolo.keyborad.exception.BusinessException;
 import com.yolo.keyborad.model.dto.AppleReceiptValidationResult;
 import com.yolo.keyborad.service.ApplePurchaseService;
+import com.yolo.keyborad.service.KeyboardUserPurchaseRecordsService;
 import com.yolo.keyborad.service.AppleReceiptService;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -23,11 +24,14 @@ public class AppleReceiptController {
 
     private final AppleReceiptService appleReceiptService;
     private final ApplePurchaseService applePurchaseService;
+    private final KeyboardUserPurchaseRecordsService purchaseRecordsService;
 
     public AppleReceiptController(AppleReceiptService appleReceiptService,
-                                  ApplePurchaseService applePurchaseService) {
+                                  ApplePurchaseService applePurchaseService,
+                                  KeyboardUserPurchaseRecordsService purchaseRecordsService) {
         this.appleReceiptService = appleReceiptService;
         this.applePurchaseService = applePurchaseService;
+        this.purchaseRecordsService = purchaseRecordsService;
     }
 
     @PostMapping("/receipt")
@@ -85,4 +89,26 @@ public class AppleReceiptController {
         return ResultUtils.success(Boolean.TRUE);
     }
 
+    /**
+     * 检查购买记录是否存在
+     * 根据 transactionId 和 originalTransactionId 查询购买记录
+     *
+     * @param body 请求体，包含 transactionId 和 originalTransactionId
+     * @return 存在返回 true，不存在返回 false
+     */
+    @PostMapping("/check-purchase")
+    public BaseResponse<Boolean> checkPurchaseExists(@RequestBody Map<String, String> body) {
+        if (body == null) {
+            throw new BusinessException(ErrorCode.PARAMS_ERROR, "body 不能为空");
+        }
+        String transactionId = body.get("transactionId");
+        String originalTransactionId = body.get("originalTransactionId");
+        if ((transactionId == null || transactionId.isBlank())
+                && (originalTransactionId == null || originalTransactionId.isBlank())) {
+            throw new BusinessException(ErrorCode.PARAMS_ERROR, "transactionId 和 originalTransactionId 不能同时为空");
+        }
+
+        boolean exists = purchaseRecordsService.checkPurchaseExists(transactionId, originalTransactionId);
+        return ResultUtils.success(exists);
+    }
 }
diff --git a/src/main/java/com/yolo/keyborad/model/entity/KeyboardUser.java b/src/main/java/com/yolo/keyborad/model/entity/KeyboardUser.java
index 93282a5..1529dcc 100644
--- a/src/main/java/com/yolo/keyborad/model/entity/KeyboardUser.java
+++ b/src/main/java/com/yolo/keyborad/model/entity/KeyboardUser.java
@@ -132,4 +132,8 @@ public class KeyboardUser {
     @TableField(value = "vip_level")
     @Schema(description = "vip等级")
     private Integer vipLevel;
+
+    @TableField(value = "uuid")
+    @Schema(description = "uuid")
+    private String uuid;
 }
diff --git a/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserInfoRespVO.java b/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserInfoRespVO.java
index adead6f..ee76f4d 100644
--- a/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserInfoRespVO.java
+++ b/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserInfoRespVO.java
@@ -57,4 +57,6 @@ public class KeyboardUserInfoRespVO {
     @Schema(description = "vip等级")
     private Integer vipLevel;
 
+    @Schema(description = "uuid")
+    private String uuid;
 }
\ No newline at end of file
diff --git a/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserRespVO.java b/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserRespVO.java
index 1449202..dc85ea9 100644
--- a/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserRespVO.java
+++ b/src/main/java/com/yolo/keyborad/model/vo/user/KeyboardUserRespVO.java
@@ -59,4 +59,8 @@ public class KeyboardUserRespVO {
     @TableField(value = "vip_level")
     @Schema(description = "vip等级")
     private Integer vipLevel;
+
+    @TableField(value = "uuid")
+    @Schema(description = "uuid")
+    private String uuid;
 }
\ No newline at end of file
diff --git a/src/main/java/com/yolo/keyborad/service/KeyboardUserPurchaseRecordsService.java b/src/main/java/com/yolo/keyborad/service/KeyboardUserPurchaseRecordsService.java
index f0786d8..cd33bef 100644
--- a/src/main/java/com/yolo/keyborad/service/KeyboardUserPurchaseRecordsService.java
+++ b/src/main/java/com/yolo/keyborad/service/KeyboardUserPurchaseRecordsService.java
@@ -8,4 +8,13 @@ import com.baomidou.mybatisplus.extension.service.IService;
 */
     
 public interface KeyboardUserPurchaseRecordsService extends IService<KeyboardUserPurchaseRecords>{
+
+    /**
+     * 检查购买记录是否存在
+     *
+     * @param transactionId 交易 ID
+     * @param originalTransactionId 原始交易 ID
+     * @return 存在返回 true，不存在返回 false
+     */
+    boolean checkPurchaseExists(String transactionId, String originalTransactionId);
 }
diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserPurchaseRecordsServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserPurchaseRecordsServiceImpl.java
index b1b089d..5490801 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserPurchaseRecordsServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserPurchaseRecordsServiceImpl.java
@@ -1,8 +1,7 @@
 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.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.yolo.keyborad.mapper.KeyboardUserPurchaseRecordsMapper;
 import com.yolo.keyborad.model.entity.KeyboardUserPurchaseRecords;
@@ -11,8 +10,19 @@ import com.yolo.keyborad.service.KeyboardUserPurchaseRecordsService;
 * @author: ziin
 * @date: 2025/12/12 15:16
 */
-    
+
 @Service
 public class KeyboardUserPurchaseRecordsServiceImpl extends ServiceImpl<KeyboardUserPurchaseRecordsMapper, KeyboardUserPurchaseRecords> implements KeyboardUserPurchaseRecordsService{
 
+    @Override
+    public boolean checkPurchaseExists(String transactionId, String originalTransactionId) {
+        LambdaQueryWrapper<KeyboardUserPurchaseRecords> queryWrapper = new LambdaQueryWrapper<>();
+        if (transactionId != null && !transactionId.isBlank()) {
+            queryWrapper.eq(KeyboardUserPurchaseRecords::getTransactionId, transactionId);
+        }
+        if (originalTransactionId != null && !originalTransactionId.isBlank()) {
+            queryWrapper.eq(KeyboardUserPurchaseRecords::getOriginalTransactionId, originalTransactionId);
+        }
+        return exists(queryWrapper);
+    }
 }
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 6702388..8700196 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/UserServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/UserServiceImpl.java
@@ -2,6 +2,7 @@ package com.yolo.keyborad.service.impl;
 
 import cn.dev33.satoken.stp.StpUtil;
 import cn.hutool.core.bean.BeanUtil;
+import cn.hutool.core.lang.UUID;
 import cn.hutool.core.util.IdUtil;
 import cn.hutool.core.util.RandomUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
@@ -203,6 +204,7 @@ public class UserServiceImpl extends ServiceImpl<KeyboardUserMapper, KeyboardUse
         keyboardUser.setSubjectId(sub);
         keyboardUser.setUid(IdUtil.getSnowflake().nextId());
         keyboardUser.setNickName("User_" + RandomUtil.randomString(6));
+        keyboardUser.setUuid(IdUtil.randomUUID());
         return keyboardUser;
     }
 
diff --git a/src/main/java/com/yolo/keyborad/service/impl/user/UserRegistrationHandler.java b/src/main/java/com/yolo/keyborad/service/impl/user/UserRegistrationHandler.java
index 8c96367..7b07efb 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/user/UserRegistrationHandler.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/user/UserRegistrationHandler.java
@@ -118,6 +118,7 @@ public class UserRegistrationHandler {
         keyboardUser.setEmail(userRegisterDTO.getMailAddress());
         keyboardUser.setGender(userRegisterDTO.getGender());
         keyboardUser.setEmailVerified(true);
+        keyboardUser.setUuid(IdUtil.randomUUID());
         return keyboardUser;
     }