On the basis of discussing the biolgical characteristics of Astragalus adsurgens, thepurpose of this paper is to analyse the utilization of A.adsurgens for the water storeage indeop soil layer and the amount of storage and nutrients in deep soil layer. The authorshold that the water and nutrients stored in loess layer of the Loess Plateau car meet theneed of 6 -10 year's growth and development for A. adsurgens in the Loess Plateau.It was pointed out that if the biological characteristcs of A. adsurgens can be grasped,the growth age can be rationally regulated and the waler and nutrient storing in deepsoil layer can be utilized three-dimensionally, then the steady and high yield couldbe obtained. Also, this will play an active role in improving the ecoenvironment ofthe Loess Plateau.