Abstract：Distributed lethality is an important attempt of the future combat mode of the US Navy. In essence, it is an extension of the thinking of control of the sea and the air in modern warfare. Distributed lethality aims to strengthen the navy's ability by improving the complexity of sea battlefield and weaken the opponent's abilities of analysis and judgment. Its main methods include: improving comprehensive capabilities of the platform, forming small-scale groups, de-volving command， and enhancing electronic warfare capability. This paper mainly analyzes its specific methods of the US Navy and shows what kind of related research and construction should be carried out to defend distributed lethality.