The automatic carton erector GPK-50 is a vertical box-opening machine with a speed of 12 boxes/min. The machine adopts PLC+ human-machine interface control. The carton can automatically complete the folding and sealing bottom during the transportation, and it does not stay in the process of folding the bottom. That is to say, the machine can complete the whole process of suction box, molding, folding and sealing bottom of carton at the same time. It is easy to operate, simple to maintain, and stable in performance.