Abstract: Based on Liu Shenge's geobotanical principles, the relationship between zonal climax vegetation types and climatic indices is studied with principal component analysis (PCA) and multiple group discriminant analysis(MGDA)methods.7 zonal climax vegetation types are divided according to the classification and ordination of. 7 meteorological factors in 210 msteorological stations. The temperature, precipitation and their various combinations are the main climatic factors affecting the formation and distribution of zonal climax vegetation types, The distribution ranges and their characteristics of hydrologic and thermal indices are defined, and the discriminant function model is established and used for predicting the zonal climax vegetation types with the accuracy of 90.32%.

Key words: Zonal climax vegetation type, Principal component analysis, Multiple group discriminant analysis