Ultraviolet disinfection technology can be divided into medium pressure and low pressure. The traditional low-pressure ultraviolet technology is a single wavelength, which only destroys the DNA structure of bacteria, so microorganisms can easily revive under the irradiation of visible light. The medium pressure ultraviolet sterilization technology is completely different from the traditional low-pressure ultraviolet sterilization technology. The medium pressure ultraviolet lamp can produce a wider ultraviolet spectrum, so it can act on the whole microorganism, not just destroy the DNA structure of the microorganism. It is precisely because this ultraviolet technology can effectively avoid the occurrence of light resurrection and dark repair of DNA in microorganisms, so it can permanently inactivate microorganisms without resurrection reaction