The invention discloses a metal product spraying device. The device comprises a shell, an emptying door is arranged on one side of the shell, multiple fixing frames are arranged on the top of the shell, nozzles are formed in the positions, corresponding to the fixing frames, of the side wall of the shell, the nozzles are connected with a lacquered can on the side wall of the shell, and a charging opening is formed in the position, outside the shell, of the lacquered can; a water pump is arranged at the bottom of the shell, and is connected to the lacquered can through a pipeline. Compared with the traditional technology, the water pump is used for pumping coating into the lacquered can, recycling is reinforced, production cost is saved, a speed reducer is used for driving the fixing frames to rotate, the coverage rate during coating spraying can be improved, too much secondary spraying is avoided, multiple devices can be controlled and monitored by a single worker, labor force is greatly relieved, and production cost is also reduced.