This paper discusses the basic theory of remote sensing image reading and classification of sand lands,the principles and bases of the boundary classfication of remote sensing types in close connection with the studies of compiling soil erosion map using the remote sensing technology.Also,the interpretion principles of the remote sensing information are used to establish the relatingships between the satellite image an the type boundary of sand lands.The geographic correlative lccations of the sandy area are determined in this region.Yhis paper also confirms that using remote sensing technology to classify the type boundaries of sand land is feasible and reliable.