The US military has taken lead in the development of new unmanned combat equipment with its powerful technological advantages. Its experience and development trend in the construction of unmanned underwater combat force have important enlightenment and reference value to the navies of all countries in the world. This paper briefly describes the development plan of the US unmanned underwater combat force，and studies its development trend from three aspects：capability building，equipment development and troop building. Five inspirations are summarized from five aspects：equipment development direction，top-level design idea，military-civilian integration approach， combination method of construction and application，and personnel training system.
