Automatic tray stacking device

The utility model belongs to the technical field of tray stacking, and particularly relates to an automatic tray stacking device. An automatic tray stacking device comprises a workbench, a tray stacking mechanism and a conveying mechanism, and the conveying mechanism comprises a sliding table module, a tray sliding plate and a pusher dog module driven by the sliding table module which are arranged in the length direction of the workbench; the disc stacking mechanism comprises a bottom plate, baffles on the two sides of the bottom plate, fixed non-return mechanisms arranged on the baffles, lifting air cylinders arranged on the end faces of the outer sides of the baffles, and movable non-return mechanisms arranged on guide rods of the lifting air cylinders. The sliding table module drives the pusher dog module to convey material trays on the material tray sliding plate to the bottom plate from the tray distributing station through the loading station, and the lifting air cylinder drives the movable non-return m