Plastic packaging box

The invention relates to the field of a packaging box and particularly relates to a plastic packaging box. The plastic packaging box comprises a plastic box body, wherein a box cover is connected withan edge of an upper side of the outer surface of the plastic box body through threads, a first damping mechanism is fixedly mounted on an inner wall of a lower side of the plastic box body, second damping mechanisms are movably connected with the positions, close to the left side and the right side, of an upper surface of the first damping mechanism through guide mechanisms, the second damping mechanisms are attached to an inner wall of the plastic box body, a containing barrel is movably installed between the second damping mechanisms, and a lower surface of the containing barrel is attachedto upper surfaces of the first damping mechanisms. The plastic packaging box is advantaged in that through the first damping mechanism, the second damping mechanisms and an abutting mechanism, the plastic packaging box has go