The fully automatic vertical machine can be used for fully automatic online shrink packaging of products. It uses photoelectric technology to automatically detect products and can be operated in either automatic feeding or manual feeding mode. It uses folded film and can seal the other three sides. The constant temperature heating sealing system can be used to seal various industrial standard heat-sealing films such as PE and POF. The sealing is firm and beautiful, especially suitable for POF sealing and PE film express bag packaging. When the product size is changed, only simple adjustments need to be made through the handwheel without replacing any parts, reducing the product changeover time and making it easier to operate. The adjustable speed front feeding system and the rear storage working platform enable the entire machine to truly achieve high-speed and unmanned automatic operation.