At small watershed in severely eroded region, whether we put landuse structure to rational state, It has a great influence upon the effect of comprehensive harnessing of soil and water conservation and the development of agricultural economiecs.On the bases of o6- nervation at experimenting plot on different slope gradient.tillage measure and vegetation condition.the landuse structure was regulated rationally.And then, combined with biological and engineering control measures, the obvious benefit of comprehensive harnessing to soil and water loss in the river basin was obtained.