In light of the problems in soil erosion intensity classification,principal component analysis andclustering analysis method were applied in soil erosion classification of Bijie karst area as an example for exploring new classification method which reflects the reality better.A number of impact factors of soil erosionwere chosen as the evaluation indices to build an evaluation index system,which forms the basis for the soilerosion intensity classification in the eight counties of Bijie karst area.The results showed that one countyexperienced mild soil erosion,five were moderate erosion grade and two were severe.The findings reflectedwell the current situation of soil erosion in Bijie karst area,and can provid the basis for soil and water conservation and management in the region.