利用该区有代表性５处站点１９０年组数据，分别采用系统聚类、判别分析、水土保持分析法对黄土区坡耕地侵蚀强度进行分级和对比。系统聚类法分级细微，判别分析法分级与习惯分法接近，水土保持法有时难以确定。进而在比较基础上，提出分级系统。 Based on 190 representative data of 5 stations in this area, systematic clustering, discriminant analysis and soil and water conservation analysis were used to classify and compare the erosion intensity of slope farmland in loess area. The system clustering method is subtle, the classification of discriminant analysis method is close to that of customary sub-method, and the soil and water conservation law is sometimes difficult to determine. Then on the basis of comparison, a hierarchical system is proposed.