As a kind of material of closing land for forest,the economic performance of mulberry at the aspect of the sericulture is obvious,but there are few study about the benefit and application in soil and water conservation.the paper contrast the soil and water conservation benefit among three district:maize ground,submarginal mulberry ground and high yield mulberry ground under four times soil loss,analyze the regression relation between erosion capacity,erosion time and rainfall factor.The result shows:the runoff of submarginal mulberry ground and high yield mulberry ground reduces respectively 24.78% and 37.83% than maize ground in four rainfall erosion courses,and the sediment of runoff reduces 21.85% and 33.55% than the maize ground.In four rainfall courses,the nutrient loss of three districts is maize ground> submarginal mulberry ground>high yield mulberry ground,and the regression relation among erosion capacity,erosion time and rainfall factor are very notable.