Biochemical experiments should carry out biological culture and biological reaction operations, which must eliminate the interference of other biological factors. Therefore, before doing these experiments, materials and instruments used in experiments that may cause pollution must be disinfected and sterilized. Commonly used sterilization methods include: high temperature, high pressure sterilization, ultraviolet radiation, flame incineration, filtration sterilization, alcohol and other reagents soaking disinfection, etc. Therefore, the laboratory must be equipped with various aseptic treatment equipment.