Ultrafiltration system for medical waste sewage

The utility model relates to an ultrafiltration system for medical waste sewage. The ultrafiltration system comprises a raw water tank, a sand filter, an activated carbon filter, an ultrafiltration device, a water producing tank and a first high-pressure pump, the raw water tank is sequentially communicated with the sand filter, the activated carbon filter and the ultrafiltration device through a raw water input pipe, the ultrafiltration device is connected with the water production tank through a purified water output pipe, the water production tank is connected with a first high-pressure pump through a pipeline, and the output end of the first high-pressure pump is respectively communicated with the purified water output pipe and the ultrafiltration device through valves; sewage in the raw water tank is firstly filtered for the first time through the sand filter and the activated carbon filter, large-particle impurities are filtered out, then the sewage is further filtered through the ultrafiltration device