Hospitals in the operation process, inevitably produced with direct or indirect infectious, toxic and other hazardous wastewater, the source of these wastewater determines the complexity of its composition, involving a variety of biological, chemical or radioactive pollution. Medical wastewater contains a large number of bacteria, viruses, insect eggs and other pathogenic pathogens, but also contains chemicals and radioisotopes, with several characteristics of space contamination, acute infection and latent infection. If the medical wastewater containing pathogenic microorganisms, not after disinfection, inactivation and other harmless treatment, but directly discharged into the urban sewers, often resulting in water and soil pollution, serious will cause a variety of diseases, or lead to waterborne infectious disease outbreaks and epidemics.