Folding and stacking device for packaging carton box

The invention discloses a folding and stacking device for a packaging carton box. The folding and stacking device for the packaging carton box comprises a carton box receiving device, a stacking device, and a conveyor belt connecting with the carton box receiving device and the stacking device, the carton box receiving device comprises a base plate supporting a carton box; a strut arranged on thebase plate, and the strut passed through an inner cavity of the carton box from the bottom of the carton box during working to limit displacement of the carton box; a hinge propping-open device arranged on the strut, the hinge propping-open device comprises a pair of propping-open arms arranged symmetrically and hinged to the strut, and a driving mechanism driving the propping-open arms to rotatein a vertical plane; and a turnover mechanism driving the base plate and the whole strut to overturn. The carton box to be folded is grabbed by mechanical arms and is backed off the strut, hinges areopened by the strut and the