Fixed leading edge

A fixed leading edge comprises a front skin, a rear skin, a heat insulation beam and an air delivery pipe, one end of the heat insulation beam is connected to the top section of the front skin, the other end of the heat insulation beam is connected to the bottom section of the front skin, the space between the front skin and the rear skin is divided into a first space and a second space through the heat insulation beam, and the air delivery pipe is arranged in the first space. An air delivery pipe is arranged on the front skin, exhaust holes are formed in the air delivery pipe, a plurality of air guide grooves are formed in the rear skin at specified intervals in the wingspan direction in a downwards-sunken mode, the air guide grooves extend to the lower end of the rear skin, and a gap is formed between the lower end of the rear skin and the bottom section of the front skin. The structure is simple, when the anti-icing function is started, deicing hot air can be guided to the lower portion of the gap, the dei