In nature, there are many substances with good bactericidal or microbial inhibitory effects, such as organic compounds of certain specific groups, some inorganic metal materials and their compounds, some minerals and natural substances. But at present, antibacterial materials refer to new functional materials that inhibit or kill surface bacteria by adding certain antibacterial substances (called antibacterial agents), such as antibacterial plastics, antibacterial fibers, antibacterial fabrics, antibacterial ceramics, antibacterial metal materials and so on.