The invention discloses an air compressor accessory for a drilling and producing well in desert. The air compressor accessory comprises a shell, wherein an exhaust pipe close to a closed end is mounted at the top of the shell; a partition board parallel with the horizontal plane is arranged at the closed end of the shell, extends to an opening end from the closed end of the shell, and divides the internal space of the shell into a gas filtering chamber and a sand collecting chamber; the sand collecting chamber is positioned at the opening end of the shell and is provided with a matched sand collecting chamber cover; a support plate is arranged on the partition board and is provided with two support rods; a rotary shaft and a rotary plate are arranged between the two support rods; the rotary plate rotates around the rotary shaft and is arranged between the support plate and the opening end; a spring is arranged between the rotary plate and the support plate; and a sand discharging hole in the partition board is formed in a position below the rotary plate. The gas filtered by the rotary plate contains greatly reduced sand, and less sand cannot damage the air filter of an air compressor.