Limiting harmonious development of the society,economy and environment,soil erosion has become one of the major environmental problems over the world. Systematic analysis was done of progresses and shortcomings in the study on soil erosion process from the aspects of raindrop splash,process of slope water erosion,transference relationships from runoff discharge to sediment discharge in the slope-gully system and sediment delivery of gully erosion. Abrief sketch was present of the history of the study on prediction of soil erosion. And a summary was made of mechanisms of vegetation and engineering measures regulating soil erosion and their effect on soil-water conservation. Besides,suggestions for future researches on soil erosion and soil-water conservation were put forward to,stating that it is essential to intensify the study in width and depth on such problems that urgently need to be solved,as process and mechanism of soil erosion,model for forecasting soil erosion on a larger scope,evaluation of environmental effect of the management of soil erosion and soil-water loss,sci-tech transformation of the techniques for regulating soil-water loss,etc..