Paint spraying device for pasteboard

The invention provides a paint spraying device for a pasteboard. A base is mounted on a base support; a pasteboard fixing mechanism is mounted at the upper end of the base; a material box is also mounted on the base; a spraying mechanism is arranged on the material box; a stretching rod is mounted at the upper end of the base; a mounting beam is mounted on the stretching rod; a material box is mounted at one end of the mounting beam through a material box mounting plate, and a spraying mechanism is mounted at the other end of the mounting beam; a pressurization box is mounted on the mounting beam in the material box; the pressurization box is communicated with the material box through a first transfer pipe and is communicated with the spraying mechanism through a second transfer pipe; thespraying mechanism comprises a mounting frame, a third transfer pipe mounted in the mounting frame, a nozzle mounting base mounted on the third transfer pipe, and a nozzle mounted on the nozzle mounting base; and the pasteboa