Abstract: In north Taihang Mountain, Shanxi Province, the forest site of water reservoir forest subregion in Wutai Mountain were classified and evaluated by the cluster analysis method. On the basis of biological characteristics of main tree species harmoniziog with site factors, similarities of site production property were discribed quantitatively by the cluster method. According to the results, the region was classified into 12 site types at a fixed similarity level, which were named by three-section name method (heat, water and nutrient). The results of growth forecast of Larix principis-rupprectii and Pinus tabulaeformis at 12 site types were coordinate with the growth status of the existing forest.

Key words: Wutai Mountains region, Forest site classification and evaluation, Clustering analysis, Site type