The invention relates to a packaging container, in particular to a pressure-resistant packaging container used for products not resistant to pressure. The packaging container comprises a shell and a cover, wherein the shell is composed of an outer ejection plate, a base and a first outer shell body, the outer ejection plate and the base are arranged at the upper end and the lower end of the first outer shell body respectively, the outer ejection plate and the base are disc-shaped, one side face of the base is provided with a buckle plate groove, and an opening in the shell is located in the side, with the buckle plate groove, of the base; the cover is composed of an inner ejection plate, a lower buckle plate and a second outer shell body, the inner ejection plate and the lower buckle plate are arranged at the upper end and the lower end of the second outer shell body respectively, the inner ejection plate is disc-shaped, the lower buckle plate is matched with the buckle plate groove in the base of the shell, and a cover opening in the cover is located in the side, with an insertion piece, of the lower buckle plate. When the cover covers the shell, the top face of the inner ejection plate on the cover is connected with the bottom face of the outer ejection plate on the shell, and the lower buckle plate on the cover is inserted into the buckle plate groove in the base of the shell. The packaging container has the advantages of being high in pressure-resistant strength, capable of being used as a packaging container and also capable of being used as a desk.