Based on typical survey,this paper analyses systematicly that a notable ecological ,economic ,social benefits has been gained conservation. harnessed small watershed, and that the available policy about the input into water and soil conversation.It is pointed out that comprehensive harnessment of small watershed is a fundamental approach to attain beautifying ecological enviroment and shaking off poverty and achieving prosperity for the mountain areas,and that practical and feasible input policy favours mobilizing the enthusiasm of the masses fully gaining comprehensive benefits of water and soil conservation.