diff --git a/blade-service/blade-system/src/main/java/org/springblade/system/service/impl/MpUserServiceImpl.java b/blade-service/blade-system/src/main/java/org/springblade/system/service/impl/MpUserServiceImpl.java
index a0a12bab..c1e77ca9 100644
--- a/blade-service/blade-system/src/main/java/org/springblade/system/service/impl/MpUserServiceImpl.java
+++ b/blade-service/blade-system/src/main/java/org/springblade/system/service/impl/MpUserServiceImpl.java
@@ -319,6 +319,13 @@ public class MpUserServiceImpl extends BaseServiceImpl<MpUserMapper, MpUser> imp
 		if (!tenantId.equals(user.getTenantId())) {
 			throw new ServiceException("租户不匹配，无法绑定 openid");
 		}
+		// 目标账号已有另一个非空 openid 时不得覆盖：旧逻辑会静默顶掉上一个微信的绑定，
+		// 而一个微信换绑需要管理员确认，登录路径只放弃本次绑定（票 05）
+		if (Func.isNotBlank(user.getOpenid()) && !user.getOpenid().equals(openid)) {
+			log.warn("小程序用户已绑定其他 openid，跳过绑定：租户={} 账号={} 已有openid={} 本次openid={}",
+				tenantId, userId, user.getOpenid(), openid);
+			return false;
+		}
 		MpUser byOpenId = getOne(Wrappers.<MpUser>lambdaQuery()
 			.eq(MpUser::getTenantId, tenantId)
 			.eq(MpUser::getOpenid, openid)