Vacuum printing-down machine

Before the vacuum printing-down machine is used, a linear electric cylinder, an electric cylinder sliding block and a supporting block can be driven to horizontally slide on an electric cylinder guiderail, then a container is driven to move at the upper end of a printing-down area, in the moving process, the printing-down area is cleaned through cleaning cotton and a cleaning agent, the cleaningeffect is good, and the printing-down area is convenient to clean. Manual operation is not needed, manpower is saved, and the working efficiency is improved; meanwhile, in the printing-down process, the photosensitive plate frame body is placed on the first connecting plate, the side wall of the photosensitive plate frame body abuts against the side wall of the supporting block, then the third limiting hole and the photosensitive plate frame body are positioned, the photosensitive plate frame body is attached to the printing-down area, an original plate on the printing-down area is tightly attached to the photosensitiv