In order to improve the eco-environment situation in Loess Plateau,it is important to evaluate the plans for the economic society developing and the model of the soil and water loess,through the way of recognizing the hundreds of soil and water control models objectively.In this paper,hierarchy,stages and regional suitability features on soil and water loss control models were proposed,and the four hierarchies: Regional,watershed,specific underlying surface,and specific issues were pointed out,by the meanin...