diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthLoginRespVO.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthLoginRespVO.java
index 1720d073..1815153c 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthLoginRespVO.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthLoginRespVO.java
@@ -27,4 +27,6 @@ public class AuthLoginRespVO {
     @Schema(description = "过期时间", requiredMode = Schema.RequiredMode.REQUIRED)
     private LocalDateTime expiresTime;
 
+    private Long tenantId;
+
 }
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthPermissionInfoRespVO.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthPermissionInfoRespVO.java
index a86cedab..d7e17854 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthPermissionInfoRespVO.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/auth/vo/AuthPermissionInfoRespVO.java
@@ -52,7 +52,7 @@ public class AuthPermissionInfoRespVO {
 
         @Schema(description = "用户邮箱", example = "yudao@iocoder.cn")
         private String email;
-
+        private Long tenantId;
     }
 
     @Schema(description = "管理后台 - 登录用户的菜单信息 Response VO")
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/UserController.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/UserController.java
index 9a90117c..a5a3ceed 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/UserController.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/UserController.java
@@ -178,4 +178,11 @@ public class UserController {
         return success(userService.importUserList(list, updateSupport));
     }
 
+    @PutMapping("/fix-tenant-id")
+    @Operation(summary = "修复用户租户ID", description = "为租户ID为空的用户设置当前租户ID")
+    @PreAuthorize("@ss.hasPermission('system:user:update')")
+    public CommonResult<Boolean> fixUserTenantId(@RequestParam("userId") Long userId) {
+        return success(userService.fixUserTenantId(userId));
+    }
+
 }
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/vo/user/UserSaveReqVO.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/vo/user/UserSaveReqVO.java
index 648382c1..9bb24a47 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/vo/user/UserSaveReqVO.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/controller/admin/user/vo/user/UserSaveReqVO.java
@@ -68,6 +68,8 @@ public class UserSaveReqVO {
 
     private Integer status;
 
+    private Long tenantId;
+
     // ========== 仅【创建】时，需要传递的字段 ==========
 
     @Schema(description = "密码", requiredMode = Schema.RequiredMode.REQUIRED, example = "123456")
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/dal/dataobject/oauth2/OAuth2AccessTokenDO.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/dal/dataobject/oauth2/OAuth2AccessTokenDO.java
index ef235ed0..5dce3869 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/dal/dataobject/oauth2/OAuth2AccessTokenDO.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/dal/dataobject/oauth2/OAuth2AccessTokenDO.java
@@ -1,6 +1,7 @@
 package cn.iocoder.yudao.module.system.dal.dataobject.oauth2;
 
 import cn.iocoder.yudao.framework.common.enums.UserTypeEnum;
+import cn.iocoder.yudao.framework.mybatis.core.dataobject.BaseDO;
 import cn.iocoder.yudao.framework.tenant.core.db.TenantBaseDO;
 import com.baomidou.mybatisplus.annotation.KeySequence;
 import com.baomidou.mybatisplus.annotation.TableField;
@@ -26,7 +27,7 @@ import java.util.Map;
 @KeySequence("system_oauth2_access_token_seq") // 用于 Oracle、PostgreSQL、Kingbase、DB2、H2 数据库的主键自增。如果是 MySQL 等数据库，可不写。
 @Data
 @EqualsAndHashCode(callSuper = true)
-public class OAuth2AccessTokenDO extends TenantBaseDO {
+public class OAuth2AccessTokenDO extends BaseDO {
 
     /**
      * 编号，数据库递增
@@ -71,5 +72,8 @@ public class OAuth2AccessTokenDO extends TenantBaseDO {
      * 过期时间
      */
     private LocalDateTime expiresTime;
-
+    /**
+     * 多租户编号
+     */
+    private Long tenantId;
 }
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthService.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthService.java
index c37d8135..20a7a1f0 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthService.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthService.java
@@ -9,7 +9,7 @@ import java.util.Map;
 
 /**
  * 管理后台的认证 Service 接口
- *
+ * <p>
  * 提供用户的登录、登出的能力
  *
  * @author 芋道源码
@@ -36,7 +36,7 @@ public interface AdminAuthService {
     /**
      * 基于 token 退出登录
      *
-     * @param token token
+     * @param token   token
      * @param logType 登出类型
      */
     void logout(String token, Integer logType);
@@ -87,7 +87,7 @@ public interface AdminAuthService {
      */
     void resetPassword(AuthResetPasswordReqVO reqVO);
 
-    WxLoginRespVO getSession( WxLoginReqVO reqVO);
+    WxLoginRespVO getSession(WxLoginReqVO reqVO);
 
     String getAccessToken();
 
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthServiceImpl.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthServiceImpl.java
index fa8af203..a5b59cd9 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthServiceImpl.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/auth/AdminAuthServiceImpl.java
@@ -230,6 +230,15 @@ public class AdminAuthServiceImpl implements AdminAuthService {
         // 创建访问令牌
         OAuth2AccessTokenDO accessTokenDO = oauth2TokenService.createAccessToken(userId, getUserType().getValue(),
                 OAuth2ClientConstants.CLIENT_ID_DEFAULT, null);
+        
+        // 获取用户信息并设置租户ID
+        AdminUserDO user = userService.getUser(userId);
+        if (user != null && user.getTenantId() != null) {
+            accessTokenDO.setTenantId(user.getTenantId());
+        } else {
+            log.warn("[createTokenAfterLoginSuccess][用户({}) 租户ID为空，可能导致登录后无法获取租户信息]", userId);
+        }
+        
         // 构建返回结果
         return AuthConvert.INSTANCE.convert(accessTokenDO);
     }
@@ -357,8 +366,8 @@ public class AdminAuthServiceImpl implements AdminAuthService {
             }
             user.setOpenid(reqVO.getOpenid());
             userService.updateByid(user);
-
-            return createTokenAfterLoginSuccess(user.getId(), user.getUsername(), LoginLogTypeEnum.LOGIN_SOCIAL);
+            AuthLoginRespVO tokenAfterLoginSuccess = createTokenAfterLoginSuccess(user.getId(), user.getUsername(), LoginLogTypeEnum.LOGIN_SOCIAL);
+            return tokenAfterLoginSuccess;
         } catch (Exception e) {
             log.error("[getPhoneNumber][解密手机号失败，encryptedData: {}, sessionKey: {}, iv: {}]",
                     reqVO.getEncryptedData(), reqVO.getSessionKey(), reqVO.getIv(), e);
@@ -377,6 +386,7 @@ public class AdminAuthServiceImpl implements AdminAuthService {
             adminUserDO.setStatus(CommonStatusEnum.DISABLE.getStatus());
             adminUserDO.setPassword("123456");
             adminUserDO.setIsSynchronize(1);
+            adminUserDO.setTenantId(1L);
             userService.createUser(adminUserDO);
             return true;
         } else {
@@ -388,6 +398,9 @@ public class AdminAuthServiceImpl implements AdminAuthService {
     @Override
     public AuthLoginRespVO getUserInfo(UserReqVO reqVO) {
         AdminUserDO user = userService.getUserByMobile(reqVO.getPhone());
+        if (user == null) {
+            throw exception(USER_NOT_EXISTS);
+        }
         // 创建 Token 令牌，记录登录日志
         return createTokenAfterLoginSuccess(user.getId(), reqVO.getPhone(), LoginLogTypeEnum.LOGIN_USERNAME);
     }
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2TokenServiceImpl.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2TokenServiceImpl.java
index fb0e756a..265eeeee 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2TokenServiceImpl.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2TokenServiceImpl.java
@@ -177,6 +177,7 @@ public class OAuth2TokenServiceImpl implements OAuth2TokenService {
                 .setUserId(userId).setUserType(userType)
                 .setClientId(clientDO.getClientId()).setScopes(scopes)
                 .setExpiresTime(LocalDateTime.now().plusSeconds(clientDO.getRefreshTokenValiditySeconds()));
+        refreshToken.setTenantId(TenantContextHolder.getTenantId());
         oauth2RefreshTokenMapper.insert(refreshToken);
         return refreshToken;
     }
@@ -199,13 +200,16 @@ public class OAuth2TokenServiceImpl implements OAuth2TokenService {
     private Map<String, String> buildUserInfo(Long userId, Integer userType) {
         if (userType.equals(UserTypeEnum.ADMIN.getValue())) {
             AdminUserDO user = adminUserService.getUser(userId);
+            if (user == null) {
+                return Collections.emptyMap();
+            }
             return MapUtil.builder(LoginUser.INFO_KEY_NICKNAME, user.getNickname())
                     .put(LoginUser.INFO_KEY_DEPT_ID, StrUtil.toStringOrNull(user.getDeptId())).build();
         } else if (userType.equals(UserTypeEnum.MEMBER.getValue())) {
             // 注意：目前 Member 暂时不读取，可以按需实现
             return Collections.emptyMap();
         }
-        return null;
+        return Collections.emptyMap();
     }
 
     private static String generateAccessToken() {
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/permission/PermissionServiceImpl.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/permission/PermissionServiceImpl.java
index 8eb5b096..4ebaf2f6 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/permission/PermissionServiceImpl.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/permission/PermissionServiceImpl.java
@@ -12,6 +12,7 @@ import cn.iocoder.yudao.module.system.dal.dataobject.permission.MenuDO;
 import cn.iocoder.yudao.module.system.dal.dataobject.permission.RoleDO;
 import cn.iocoder.yudao.module.system.dal.dataobject.permission.RoleMenuDO;
 import cn.iocoder.yudao.module.system.dal.dataobject.permission.UserRoleDO;
+import cn.iocoder.yudao.module.system.dal.dataobject.user.AdminUserDO;
 import cn.iocoder.yudao.module.system.dal.mysql.permission.RoleMenuMapper;
 import cn.iocoder.yudao.module.system.dal.mysql.permission.UserRoleMapper;
 import cn.iocoder.yudao.module.system.dal.redis.RedisKeyConstants;
@@ -286,7 +287,10 @@ public class PermissionServiceImpl implements PermissionService {
         }
 
         // 获得用户的部门编号的缓存，通过 Guava 的 Suppliers 惰性求值，即有且仅有第一次发起 DB 的查询
-        Supplier<Long> userDeptId = Suppliers.memoize(() -> userService.getUser(userId).getDeptId());
+        Supplier<Long> userDeptId = Suppliers.memoize(() -> {
+            AdminUserDO user = userService.getUser(userId);
+            return user != null ? user.getDeptId() : null;
+        });
         // 遍历每个角色，计算
         for (RoleDO role : roles) {
             // 为空时，跳过
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserService.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserService.java
index b3647b3f..72085a5a 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserService.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserService.java
@@ -215,4 +215,12 @@ public interface AdminUserService {
     boolean isPasswordMatch(String rawPassword, String encodedPassword);
 
     void updateByid(AdminUserDO user);
+
+    /**
+     * 修复用户租户ID
+     *
+     * @param userId 用户编号
+     * @return 是否修复成功
+     */
+    Boolean fixUserTenantId(Long userId);
 }
diff --git a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserServiceImpl.java b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserServiceImpl.java
index e6459243..3f554d6e 100644
--- a/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserServiceImpl.java
+++ b/yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/service/user/AdminUserServiceImpl.java
@@ -12,6 +12,7 @@ import cn.iocoder.yudao.framework.common.util.collection.CollectionUtils;
 import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
 import cn.iocoder.yudao.framework.common.util.validation.ValidationUtils;
 import cn.iocoder.yudao.framework.datapermission.core.util.DataPermissionUtils;
+import cn.iocoder.yudao.framework.tenant.core.context.TenantContextHolder;
 import cn.iocoder.yudao.module.infra.api.config.ConfigApi;
 import cn.iocoder.yudao.module.system.controller.admin.auth.vo.AuthRegisterReqVO;
 import cn.iocoder.yudao.module.system.controller.admin.user.vo.profile.UserProfileUpdatePasswordReqVO;
@@ -161,6 +162,13 @@ public class AdminUserServiceImpl implements AdminUserService {
         AdminUserDO user = BeanUtils.toBean(registerReqVO, AdminUserDO.class);
         user.setStatus(CommonStatusEnum.ENABLE.getStatus()); // 默认开启
         user.setPassword(encodePassword(registerReqVO.getPassword())); // 加密密码
+        // 设置租户ID
+        Long tenantId = TenantContextHolder.getTenantId();
+        if (tenantId != null) {
+            user.setTenantId(tenantId);
+        } else {
+            log.warn("[registerUser][注册用户时租户ID为空，可能导致用户无法正常访问系统]");
+        }
         userMapper.insert(user);
         return user.getId();
     }
@@ -586,4 +594,34 @@ public class AdminUserServiceImpl implements AdminUserService {
         return passwordEncoder.encode(password);
     }
 
+    @Override
+    public Boolean fixUserTenantId(Long userId) {
+        // 获取用户信息
+        AdminUserDO user = userMapper.selectById(userId);
+        if (user == null) {
+            throw exception(USER_NOT_EXISTS);
+        }
+        
+        // 如果用户已经有租户ID，则不需要修复
+        if (user.getTenantId() != null) {
+            log.info("[fixUserTenantId][用户已有租户ID，无需修复] 用户ID: {}, 租户ID: {}", userId, user.getTenantId());
+            return true;
+        }
+        
+        // 获取当前租户ID
+        Long currentTenantId = TenantContextHolder.getTenantId();
+        if (currentTenantId == null) {
+            throw exception(USER_NOT_EXISTS, "当前租户上下文为空，无法修复用户租户ID");
+        }
+        
+        // 更新用户的租户ID
+        AdminUserDO updateUser = new AdminUserDO();
+        updateUser.setId(userId);
+        updateUser.setTenantId(currentTenantId);
+        userMapper.updateById(updateUser);
+        
+        log.info("[fixUserTenantId][用户租户ID修复成功] 用户ID: {}, 原租户ID: null, 新租户ID: {}", userId, currentTenantId);
+        return true;
+    }
+
 }
diff --git a/yudao-server/src/main/resources/application.yaml b/yudao-server/src/main/resources/application.yaml
index 79117279..51a01054 100644
--- a/yudao-server/src/main/resources/application.yaml
+++ b/yudao-server/src/main/resources/application.yaml
@@ -281,7 +281,7 @@ yudao:
       - /admin-api/system/auth/get-session
       - /admin-api/system/auth/get-phone-number
       - /admin-api/system/auth/api/user-add
-      - /admin-api/system/api/user-info
+      - /admin-api/system/auth/api/user-info
     ignore-visit-urls:
       - /admin-api/system/user/profile/**
       - /admin-api/system/auth/**