Pile lift is auxiliary equipment for paper cutting machine, which can match with the paper cutting machine or other auxiliary cutting equipments (such as jogging machine, paper feeder, paper un-loader, air table, lift table and etc. ) to build a production line fit to various cutting technical flow. This machine is controlled by infrared photoelectric switch and driven by hydraulic system. It can ensure the paper pile to keep on the prepared height position automatically so that the paper can be loaded or unloaded conveniently. It can reduce the heavy workload of carrying the paper up and down manually, improve cutting efficiency and help the program control cutting machine to play its potential. The machine is equipped with rolling wheels and fixing screws so that it can not only be moved freely but also be fixed on a certain position.