There are two types of electroless magnesium plating: one is molten magnesium plating, and the other is electrolytic magnesium plating. Hot-melt magnesium plating refers to putting magnesium metal into high-temperature molten magnesium liquid to form a magnesium film on the surface of magnesium metal to improve surface properties. Electrolytic magnesium plating refers to putting magnesium metal into the electrolyte, and through the action of electric current, a layer of magnesium film is formed on the surface of magnesium metal to improve the surface properties. Both molten magnesium plating and electrolytic magnesium plating can be used for magnesium plating, but there are certain differences between the two: molten magnesium plating has high temperature, high energy consumption, and fast speed, but the surface finish is low; while electrolytic magnesium plating has low temperature and energy consumption. Small, slow, but with a high surface finish. Therefore, according to actual needs, different magnesium plating methods can be selected according to actual needs.