介绍了福建省安溪县铁峰山花岗岩矿区水土流失基本情况 ,以集水区为单元探讨了水土流失量的预测 ,取得了理想结果 ,并在实际中得到成功应用。在此基础上 ,提出了露天矿水土流失量的预测不能只针对矿区 ,而应以集水区为单元进行综合评估 ,才能合理布置综合治理措施 ,进行彻底治理的技术性途径 This paper introduces the basic situation of soil and water loss in Tiefengshan granite mining area in Anxi County, Fujian Province. The water and soil loss amount prediction is discussed with catchment area as an example, and the ideal result is obtained, which is successfully applied in practice. On this basis, it is put forward that the prediction of the amount of soil and water loss in surface mine can not only be aimed at the mining area, but should be comprehensively evaluated by the catchment area as a unit, in order to rationally arrange the comprehensive control measures and conduct a thorough technical treatment