The utility model relates to a device for sorting, distributing and switching articles. The utility model discloses an automatic palletizing system which comprises a pallet lifting mechanism, a support, an operation car and a buffer memory mechanism. The pallet lifting mechanism is installed on a front column of the support and can slide up and down along the front column; the buffer memory mechanism is installed on a rear column of the support and can slide up and down along the rear column; and the operation car is installed on a crossbeam of the support and can slide back and forth along the crossbeam. The system is high in efficiency and low in energy dissipation, is easy to assemble and convenient to maintain, is convenient to connect with existing conveying mechanisms, has good compatibility, and can be applied to turnover cases of different specifications.