The utility model relates to the technical field of aircrafts. The utility model relates to an aircraft, in particular to a variable-power autoroatation rotor aircraft. The unmanned aerial vehicle comprises a fuselage, engines, rotors and propellers, the wings are fixed at the rear position of the bottom of the fuselage; rear landing wheels are mounted at the end parts below the wings; a front lifting wheel is fixed at the front position of the bottom of the body; an empennage and a tail vane are arranged at the rear of the fuselage; a propeller is fixed at the tail of the fuselage; rotor wings are fixed to the top of the fuselage through rotor wing supports. The inclination angle of the rotor wing can be adjusted by the rotor wing bracket and the rotor wing adjusting rod positioned in therotor wing bracket; an engine is arranged at the rear section in the fuselage; the aircraft has the advantages that the aircraft is good in safety, stability and flexibility, the functions of vertical take-off and landing, short-distance take-off and landing, high-speed cruising and the like can be realized, and the aircraft can be applied to the fields of flight movement, photography and aerialphotography, relay communication and the like.