diff --git a/pigx-upms/pigx-upms-biz/src/main/java/com/pig4cloud/pigx/admin/service/impl/SysUserServiceImpl.java b/pigx-upms/pigx-upms-biz/src/main/java/com/pig4cloud/pigx/admin/service/impl/SysUserServiceImpl.java
index a87c8a3e3..05a695350 100644
--- a/pigx-upms/pigx-upms-biz/src/main/java/com/pig4cloud/pigx/admin/service/impl/SysUserServiceImpl.java
+++ b/pigx-upms/pigx-upms-biz/src/main/java/com/pig4cloud/pigx/admin/service/impl/SysUserServiceImpl.java
@@ -378,8 +378,12 @@ public class SysUserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> impl
 	@CacheEvict(value = CacheConstants.USER_DETAILS, key = "#username")
 	public R<Boolean> lockUser(String username) {
 		SysUser sysUser = baseMapper.selectOne(Wrappers.<SysUser>lambdaQuery().eq(SysUser::getUsername, username));
-		sysUser.setLockFlag(CommonConstants.STATUS_LOCK);
-		baseMapper.updateById(sysUser);
+
+		if (Objects.nonNull(sysUser)){
+			sysUser.setLockFlag(CommonConstants.STATUS_LOCK);
+			baseMapper.updateById(sysUser);
+		}
+
 		return R.ok();
 	}