Unstacking and stacking machine

The invention relates to an unstacking and stacking machine which solves the technical problems of inconvenient feeding and discharging, low unstacking and stacking efficiency, narrow application range, incapability of cooperating with a robot to realize intelligent feeding and discharging, and large volume of an existing unstacking and stacking machine. The technical scheme is as follows: the unstacking and stacking machine comprises a transmission positioning mechanism as well as an unstacking mechanism and a stacking mechanism which are respectively arranged at the inlet and outlet of the transmission positioning mechanism; the unstacking mechanism comprises two groups of frames which are symmetrically arranged, two groups of lifting mechanisms which are respectively arranged in the twogroups of frames, first conveying mechanisms which are arranged in the two groups of lifting mechanisms and lug telescopic mechanisms which are respectively arranged at the tops of the two groups oflifting mechanisms and are