Abstract：The emission of Pb-Zn sulfide ore floatation wastewater, which would last for a long time and is not easy to control and treat, is huge, and usually contains heavy metals, inorganic or organic medications of floatation and suspended matters. The direct discharge of floatation wastewater would pollute and endanger the environment seriously. However, with proper treatment, it could be reused in an ore beneficiation process, with the ore beneficiation indexes basically the same as while using clear water, not only resulting in cleansing and protection of mine, but also with good economical and social benefits. In this paper, the origin and the environmental hazards of flotation wastewater, the situation of its purifying and comprehensive utilizing are discussed. At present, the methods of treatment mainly include the coagulative precipitation, the coagulative precipitation-activated carbon adsorption, and the coagulative precipitation-oxidation and the natural degradation. Finally, the achievements and problems in wastewater treatment in China are reviewed, and the future directions of research and development of wastewater treatment are put forward.