In order to discuss productive potentialities and technical ways of dryland faiming in Loess hilly areas, a study on cropping system of dryland farming was carriedout in the eroded tadaeland hilly areas located in Pengang County of the South Nongxia during 1986-1990. According to the study, it is concluded that the croppirsystem of dryland farming is taking the comprehensive measures of grassanimal husbandry nutrients grain as a centre, and building a system of the drought ressistance and presereation of soil moisture, selection and introduction for fine varieties ofcrops, optimal tillage and cultivation. This system is the foundation and guarantee toobtain high- and steadyyield for dryland farming in Loess hilly areas.