Abstract:This paper introduces the wastewater treatment status of three non-ferrous metal smelting enterprises, the processes adopted, the destination of the treated wastewater, and the use of reused water. Through comparison, it is concluded that wastewater needs to be collected separately and treated according to quality. In the selection of advanced wastewater treatment technology, it is recommended to choose technologies such as evaporation and crystallization, so that the solid materials in the wastewater must be opened out of the water in the end to maintain the material balance, so that the reused water can be recycled.