The invention belongs to the field of preparation of unmanned aircrafts, and particularly relates to a long-endurance aircraft. The aircraft comprises an orthohexagonal center plate, wherein the center plate comprises an upper center plate and a lower center plate; six ailerons are arranged and connected to six angles of the regular hexagon between the upper center plate and lower center plate; an upper inclination angle of 3-5 degrees is arranged between each aileron and the center plate; the end of each aileron is provided with a propeller; and propelling air generated by the rotating propellers flows to the outer side of the center plate. Since the ailerons simultaneously are connected at an anhedral angle of 3-5 degrees, the propelling air generated by the rotating propellers flows to the outer side of the center plate; and at this time, the lift force of the aircraft is inward, thereby saving the efficiency of the motor and prolonging the flight time.