▎ 摘　　要

NOVELTY - The utility model claims an underwater unmanned aircraft, belonging to the technical field of underwater aircraft, comprising a machine body, a pump jet propeller, a generating assembly and a battery assembly, wherein the machine body comprises a head part set from front to back sequentially the machine body and the tail part, the head part is provided with a water inlet hole, the inner part of the machine body is provided with a water flow passage connected with the water inlet hole, the water flow passage extends along the machine body from front to back the pump jet propeller is set on the tail part, the inlet of the pump jet propeller is connected with the water flow channel, the outlet of the pump jet propeller is connected with the outside; the generating component comprises graphene substrate structure graphene the substrate structure is set in the machine body and located on the flow path of the water flow; the battery assembly is set in the machine body, the battery assembly can provide electric energy for the pump jet propeller. the water flow in the flow process of the machine body generates electric energy graphene the substrate structure of the generating assembly, compensating the part of electric energy consumed by the aircraft during the navigation process, improving the endurance of the aircraft.