This project is located in Ala Township, the eastern suburb of Kunming City, Yunnan Province. The treatment object is the landfill leachate produced in the garbage pit of the factory. The treatment scale is 200m3/d. It adopts "anaerobic + two-stage A/O + external ultrafiltration + nanofiltration/ RO" treatment process, the treated effluent meets the GB16889-2008 Table 3 standard, and the system recovery rate reaches more than 80%; part of the treated effluent is used for circulating cooling, and part is used for site greening irrigation.