目前国内地铁特长海底隧道消防系统的设置尚无明确标准可依，为了深入研究地铁特长海底隧道消防系统的设计标准，结合青岛、厦门等地的地铁特长海底隧道消防系统设计，分析了地铁特长海底隧道的火灾原因及特点，提出了特长隧道内消火栓、轻水泡沫及自动喷水灭火系统等典型方案设计建议，并对地铁特长海底隧道消防给水系统设计中的一些关键技术问题从方案比选等方面加以论述，其中包括一些关于地铁特长海底隧道消防给水系统设计方面的思考和体会。推荐消火栓系统+联络通道内设置高压细水雾系统，指出管材及管道结构安全是设计中应重点关注的问题。

At present there are no standards to follow in the design of the firefighting water supply system of extralong submarine Metro tunnels. In the paper, the causes for and characteristics of the fires in extralong submarine Metro tunnels are analyzed on basis of the design of the firefighting water supply system of extralong submarine Metro tunnels in Qingdao and Xiamen; typical schemes, i.e., fire hydrant system, AFFF (aqueous film forming foam) system and automatic waterspray fireextinguishing system, are proposed for the extralong submarine Metro tunnels; some key technical issues related to the design of the water supply of the firefighting system of extralong submarine Metro tunnels, including the scheme comparison and design considerations, are discussed; it is proposed that "fire hydrant system + high pressure water mist system installed in the connection galleries" should be adopted; it is pointed out that special attention should be paid to the material and structural safety of the pipes in the design. 