High-efficiency pneumatic colorful spraying device

A high-efficiency pneumatic colorful spraying device comprises a compressed gas generating device and a material conveying device. The material conveying device comprises a pneumatic diaphragm pump, a feeding hole of the pneumatic diaphragm pump is communicated with one end of a coating feeding pipe, and the other end of the coating feeding pipe is arranged in the coating in the coating barrel; a discharge port of the pneumatic diaphragm pump is communicated with a feed port of the spray gun through a connecting pipe; the compressed gas generating device comprises at least two small swinging reciprocating piston type oilless air compressors which are connected in parallel and have the same specification, and a connecting port of an air outlet of each air compressor is communicated with an air inlet of the corresponding spray gun through an air guide pipe; and the other connector of the air outlet of the air compressor is connected with the air inlet of the pneumatic diaphragm pump through an air guide pipe, a