> For the complete documentation index, see [llms.txt](https://docs.pancakeswap.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pancakeswap.finance/chinese/jiao-yi-gong-ju/trading-tools-faq/mev-guard-faq.md).

# MEV Guard 常见问题解答

## 什么是 MEV 和三明治攻击？

MEV（最大可提取价值）是指通过在区块内重新排序或包含交易而能够获得的额外利润。

三明治攻击是一种特定类型的 MEV 攻击，攻击者在目标交易之前放置一笔交易、之后放置另一笔交易，以操纵某项资产的价格从而牟利。这会导致受害者承担更高的成本或获得更差的结果。

## 什么是 MEV 防护 RPC 节点？

它是一种用于与区块链交互的专用网关，可帮助保护用户免受 MEV（最大可提取价值）的利用，例如三明治攻击。

## MEV Guard 如何保护我免受攻击？

该节点通过私有中继路由交易，并结合其他防护机制，确保用户的交易被安全处理且不受干扰，从而降低滑点、价格操纵或价值损失的风险。

## 我该如何安装 MEV Guard？

按照页面说明将 MEV 防护节点切换或添加到您的钱包。

如果您使用的是 MetaMask，只需点击按钮即可完成。如果您使用其他钱包，请参阅详细指南手动添加网络。

## 我该如何禁用或移除 MEV Guard？

如果您使用的是 MetaMask，只需将您的 RPC 节点切换回常规的公共节点即可。如果您使用其他钱包，请参阅详细指南手动将网络切换回公共节点。


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