Quick shaping packing carton

The utility model discloses a quick shaping packing carton, including box bin, box bin include the box bottom and with four curb plates that the box bottom broken line is connected, four the curb plate includes relative two first curb plates that set up and two second curb plates of relative setting, every the both ends of first curb plate all extend be equipped with with the second curb plate adjoins the corner board that connects, every be equipped with the backfin line on the board of corner, the backfin line when the packing carton expandes all along cornerwise extending direction of box bottom sets up, the backfin line will formation joining region and activity district are separated to the corner board, first curb plate fifty percent discount in on the box bottom, just the joining region is fixed in on the second curb plate. Every be equipped with the breach on the board of corner, the breach will the backfin line cuts off and forms two strip broken lines. The utility model discloses can shorten consumi