The conveyor belt transports the printed matter to the front of the transparent heat shrink film that has been pulled up, and as the conveyor belt moves, the printed matter is accurately wrapped in the heat shrink film. The heat shrink film tightly adheres to the surface of the printed matter to protect and secure it. Then, after passing through a preheating device, the heat shrink film is heated to shrink it and wrap it tightly on the printed matter. The preheating device ensures that the heat shrink film shrinks at an appropriate temperature to avoid any damage or deformation. Shrink packaging machines operate quickly and efficiently and can pack large quantities of printed matter continuously. Once the packaging is completed, the conveyor belt moves the packaged printed matter to the front of the next process, ready to enter the next link. The entire packaging process is automated, eliminating the time and labor costs of manual packaging, while ensuring the packaging quality and consistency of printed matter.