AIRCRAFT FLAP

The invention discloses an aircraft flap, which belongs to the field of aircraft high-lift systems and is used for reducing noise at a flap side edge and controlling aerodynamic loss. A main technical solution of the invention is as follows: An aircraft flap excluding an actuating structure for providing air jet includes at least one side edge opening, and the side edge opening is connected to one or more air passages for leading in/out airflows to reduce intensity of vortex structures of a flap side edge. The air passage runs through a first surface and a second surface of the flap, and forms a first side edge opening on the first surface and a second side edge opening on the second surface. One of the first surface and the second surface is a side surface of the flap. One of the first side edge opening and the second side edge opening is a side surface opening. The aircraft flap can reduce the aerodynamic loss while ensuring a noise reduction effect, and has simple structure and high practicability.