Superoxide Dismutase (SOD) can specifically remove superoxide ions in organisms, balance oxygen free radicals in organisms, and protect human cells from environmental factors. Modern medical research shows that SOD has the functions of anti-aging, anti-radiation, anti-fatigue, anti-inflammation, inhibition of tumors and cancer cells. Fred Devic, a famous American biologist and "Father of Superoxide Dismutase", has come to the conclusion through a large number of experiments that Superoxide Dismutase (SOD) is the key for human beings to overcome diseases and aging, improve human immunity, effectively reduce blood lipid, cholesterol and blood pressure, enhance liver and kidney functions, prevent prostatitis, regulate women's physiological cycle and postpone menopause. SOD enzyme also has obvious recovery effect on diabetes. At present, the SOD enzyme on the market is easily inactivated due to its poor thermal stability, which greatly affects its normal function and the market demand is greatly limited. At present, SOD circulating in the market is mostly extracted from animal blood, so it is difficult for human beings to eliminate various viruses and exogenous pollution. In 1999, the European Union issued a decree prohibiting the extraction of SOD from animal blood for human use. At present, Japan, Canada and other countries have also begun to use new biotechnology such as gene recombination to synthesize SOD. Therefore, it is the most important way to produce a new generation of SOD enzyme with high stability and heat resistance by bioengineering technology.