Superoxide dismutase (SOD) is a metal-containing enzyme widely existing in living organisms. It can specifically remove superoxide anion free radicals. At present, it has become a popular biological enzyme at home and abroad with the function of anti-oxidation, anti-aging and enhancing the immune function of the body.Due to its special function, superoxide dismutase (SOD) is widely used in health care products, cosmetics, beer and beverage enterprises at home and abroad and has a broad market and application prospect. Superoxide dismutase (SOD) is an antioxidant metalloenzyme that exists in the body. It can catalyze the disproportionation of superoxide anion free radicals to form oxygen and hydroge peroxide. The role is inseparable from the occurrence and development of many diseases.