Spray coating machine is the associated equipment of the laser process. The cylinder is coated before the laser procedure. The coating has a direct effect on the laser engraving. The machine has the advantages of simple structure, easy operation and high speed. It uses adjustable fan-shaped nozzles. The coating is smooth, uniform, clean and once-forming. The machine adopts fully automatic spraying system, enclosed dustproof facility, non-leakage of coat fog and convenient loading of cylinders.