Tray feeding device

The utility model belongs to the technical field of feeding and discharging equipment, and particularly relates to a tray feeding device. A tray feeding device comprises a supporting frame and a supporting plate horizontally arranged on the supporting frame, the supporting plate is provided with a containing cavity defined by two side plates and a vertical plate, and a feeding gap for a tray to pass through is formed between the lower end face of the vertical plate and the upper end face of the supporting plate; a supporting air cylinder and a limiting air cylinder are arranged on the two side plates respectively, and when guide rods of the supporting air cylinder and the limiting air cylinder stretch out, the supporting air cylinder and the limiting air cylinder are clamped in the positioning groove of the tray on the lowermost layer and the positioning groove of the tray abutting against the tray on the lowermost layer respectively to support the tray set. A sliding frame and a material pushing air cylinder