Medical sewage pretreatment system

The utility model relates to the technical field of sewage treatment, in particular to a medical sewage pretreatment system which comprises a water inlet pipe, one end of the water inlet pipe is communicated with a filter box, the filter box is communicated with a sediment box through a first connecting pipe, the sediment box is communicated with a disinfection box through a second connecting pipe, and the disinfection box is communicated with a sterilization box through a third connecting pipe. An ozone tank is fixedly mounted on the disinfection box and is communicated with the disinfection box. According to the sewage treatment device disclosed by the utility model, by arranging the filter cartridge, when sewage enters the filter box, the sewage is finely filtered, then the sewage is precipitated by the precipitation box, impurities in the sewage are precipitated out, and the sewage is disinfected in a manner of injecting ozone. And finally, the sewage is guided into a sterilization box, the sewage is ster