Energy crisis, environmental pollution and other growing environmental problems have caused wide public concern, and energy conservation and emission reduction gradually become consensuses in scientific research and industrial production. As the lightest structural metal, magnesium(Mg) alloys have been widely used in a number of fields such as aviation, spaceflight, high-speed rail and automotive. However, the corrosion resistance of magnesium alloys is extremely poor, which seriously restricts their widespread use. The improvement of corrosion resistance is the key to the large-scale use of Mg alloys in the industrial field. Use of reliable surface protection coatings is an effective method to protect Mg alloys from corrosion. In addition to improving corrosion resistance, diverse service environments put forward more functional requirements for coatings. The warm and humid atmospheric environment of ocean provides favorable conditions. The formation of microbial film will not only accelerate the degradation failure of the coating, but also cause the corrosion of the substrate and shorten the service life of the equipment due to its secretion of organic acids. Therefore, the development of eco-friendly anticorrosion and antibacterial coatings has attracted more and more attention.