Vegetation at different slope positions has different roles in soil and water conservation. This paper com-pares the discrepancies of sediment yield induced by rainfall with vegetation dist ributed in the upper , middle and lower slopes. Result s indicate that vegetation dist ributed in the lower slope conserves soil better than that in the upper and middle slopes. As rainfall intensity decreases , the discrepancies become more distinct .So,vegetation in the lower slope is very important to soil and water conservation on slopping land. The Loess Plateau is the typical area suffering f rom severe soil and water loss , on which rainstorm occurs rarely. The rainfall intensity which in- duces soil erosion is rarely greater than 50 mm/h. Under the condition , vegetation in the lower slope can play an important role. Therefore , we should well protect vegetation in the lower slope to conserve soil. We put forward some suggestions for a better landuse on slopping land.