Magnetic ring packaging box convenient to insert and fix

A magnetic ring packaging box convenient to insert and fix comprises a magnetic ring and a packaging box body, the magnetic ring is composed of two magnetic ring bodies with semicircular cross sections, and step planes are formed at the upper ends and the lower ends of the magnetic ring bodies. According to the structure of the packaging box, a left box body and a right box body are both hollow cylindrical barrels, and the two sides of a plastic hinge block are formed together with one side face of the left box body and one side face of the right box body respectively; a hasp plate is formed on the left box body, a buckling hole is formed in the hasp plate, a hasp block is formed on the right box body, and the hasp block is buckled in the buckling hole. The packaging box can be assembled only by buckling the packaging box together, the packaging box is further provided with a plurality of heat dissipation holes, heat dissipation of the magnetic ring is facilitated, meanwhile, the packaging box is provided wit