diff --git a/server/HoneyBox/src/HoneyBox.Core/Services/AuthService.cs b/server/HoneyBox/src/HoneyBox.Core/Services/AuthService.cs
index 5984e6d4..4b662b16 100644
--- a/server/HoneyBox/src/HoneyBox.Core/Services/AuthService.cs
+++ b/server/HoneyBox/src/HoneyBox.Core/Services/AuthService.cs
@@ -134,7 +134,7 @@ public class AuthService : IAuthService
                     UnionId = unionId,
                     Nickname = $"用户{Random.Shared.Next(100000, 999999)}",
                     Headimg = GenerateDefaultAvatar(openId),
-                    Pid = pid ?? 0,
+                    Pid = pid?.ToString(),
                     ClickId = ParseClickId(clickId)
                 };
 
@@ -252,7 +252,7 @@ public class AuthService : IAuthService
                     Mobile = mobile,
                     Nickname = $"用户{Random.Shared.Next(100000, 999999)}",
                     Headimg = GenerateDefaultAvatar(mobile),
-                    Pid = pid ?? 0,
+                    Pid = pid?.ToString(),
                     ClickId = ParseClickId(clickId)
                 };
 
diff --git a/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs b/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs
index 33202330..f1bd66cf 100644
--- a/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs
+++ b/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs
@@ -65,6 +65,37 @@ public class UserService : BaseService<User, int>, IUserService
         // Generate UID based on config
         var uid = await GenerateUidAsync();
 
+        // 处理推荐人ID - 支持通过 ID 或 uid 查找
+        var pid = 0;
+        if (!string.IsNullOrWhiteSpace(dto.Pid))
+        {
+            // 先尝试作为用户ID查找（如果是数字）
+            if (int.TryParse(dto.Pid, out var pidInt) && pidInt > 0)
+            {
+                var inviterById = await _dbSet.FirstOrDefaultAsync(u => u.Id == pidInt);
+                if (inviterById != null)
+                {
+                    pid = inviterById.Id;
+                    _logger.LogInformation("通过用户ID找到推荐人: Pid={Pid}", pid);
+                }
+            }
+            
+            // 如果还没找到，尝试作为 uid 查找
+            if (pid == 0)
+            {
+                var inviterByUid = await _dbSet.FirstOrDefaultAsync(u => u.Uid == dto.Pid);
+                if (inviterByUid != null)
+                {
+                    pid = inviterByUid.Id;
+                    _logger.LogInformation("通过UID找到推荐人: Uid={Uid}, Pid={Pid}", dto.Pid, pid);
+                }
+                else
+                {
+                    _logger.LogWarning("未找到推荐人: Pid={Pid}", dto.Pid);
+                }
+            }
+        }
+
         var user = new User
         {
             OpenId = dto.OpenId ?? string.Empty,
@@ -73,7 +104,7 @@ public class UserService : BaseService<User, int>, IUserService
             Uid = uid,
             Nickname = dto.Nickname ?? $"User{Random.Shared.Next(1000, 9999)}",
             HeadImg = dto.Headimg ?? string.Empty,
-            Pid = dto.Pid,
+            Pid = pid,
             ClickId = dto.ClickId,
             Money = 0,
             Money2 = 0,
@@ -89,7 +120,8 @@ public class UserService : BaseService<User, int>, IUserService
         await _dbSet.AddAsync(user);
         await _dbContext.SaveChangesAsync();
 
-        _logger.LogInformation($"User created: Id={user.Id}, Uid={user.Uid}, OpenId={user.OpenId}");
+        _logger.LogInformation("User created: Id={UserId}, Uid={Uid}, OpenId={OpenId}, Pid={Pid}", 
+            user.Id, user.Uid, user.OpenId, user.Pid);
 
         return user;
     }
diff --git a/server/HoneyBox/src/HoneyBox.Model/Models/Auth/CreateUserDto.cs b/server/HoneyBox/src/HoneyBox.Model/Models/Auth/CreateUserDto.cs
index d88996fc..935d9b10 100644
--- a/server/HoneyBox/src/HoneyBox.Model/Models/Auth/CreateUserDto.cs
+++ b/server/HoneyBox/src/HoneyBox.Model/Models/Auth/CreateUserDto.cs
@@ -31,9 +31,9 @@ public class CreateUserDto
     public string? Headimg { get; set; }
 
     /// <summary>
-    /// 推荐人ID
+    /// 推荐人ID或UID
     /// </summary>
-    public int Pid { get; set; }
+    public string? Pid { get; set; }
 
     /// <summary>
     /// 点击ID