Packaging box is a packaging technology between rigid and flexible packaging. The packaging material has a certain flexibility, is not easy to deform, has high compressive strength, and is more rigid than that of bagged materials. The packaging structure is a cube with regular geometric shapes, and can also be cut into other shapes, such as round boxes, sharp corners, generally small capacity, and opening and closing devices. Packaging operations generally use yarding or filling, and then closing the opening and closing device. The overall strength of the packaging box is not large, the packaging volume is not large, it is not suitable for transportation packaging, suitable for commercial packaging, inner packaging, suitable for packaging blocks and various special-shaped items. Packaging boxes are an important category in rigid packaging technology. The packaging material is rigid or semi-rigid, with high strength and not easy to deform. The packaging structure and packaging box are the same, but the volume and shape are larger than the packaging box, and the two are usually divided by 10 liters. The packaging operation is mainly stacking, and then closing the opening and closing device or fixing and sealing one end. The overall strength of the packaging box is high, the deformation resistance is strong, the packaging amount is also large, suitable for transportation packaging, outer packaging, a wide range of packaging, mainly used for solid grocery packaging. Mainly corrugated boxes.