Abstract: This paper mainly focuses on Yunnan Pine community of Yunlong dam’s headwater conservation forest in Kunming. 15 sampling plots were selected as a typical representative for this type of study in the paper. Through the coordinate comprehensive analysis and classified evaluation, this paper appraised different structures of various communities and their relationship with the functions of ecological water conservation. It concludes that the mixed species of plants and conifer with complex structure of arbor, shrub and lawn were the best water conservation forests, the mixed species of hard broadleaf forests and coniferous forest were inferior to the former, and the single of pure forests of Yunnan Pine with grass were the worst.

Key words: water conservation forest, the structure of community, Kunming