The water-wind erosion compound areas of farming and grazing interlaced zone in northern China are very special ecological fragile areas.The two anthropogenic factors,agriculture and animal husbandry,and the two natural factors,wind erosion and water erosion,affect together on the same space scale and different time scale,which results in the serious soil erosion and land desertification.In this paper,based on the data of our field work and investigation to 60 typical counties,we analyzed some problems of f...