With the development of ultra-thin, ultra-light, and miniaturization of electronic products, more and more alloy materials such as aluminum, magnesium and titanium were used in 3C fuselage structural parts. Electronic products, especially the casings of laptop computers and mobile phones, not only require high surface hardness and good wear resistance, but also require gorgeous and exquisite appearance, for which reason micro-arc oxidation colored films have become a research hotspot.