Abstract: The Jinyun Mountain is situated in the northwestern part of Beibei district, Chongqing (29˚54′ N, 106˚29′E). It is possessed of the most typical zonal vegetation-evergreen broad-leaved forest of the mid-subtropics. It falls in the subtropical monsoon climate which is characterized by high temperatures and heavy rainfall in summer, and mildness and a small amounts of rainfall in winter. In the study of the forest communities of the Jinyun Mountain, the sampling technique of the point-centred quarter method was adopted. The numerical classification methods--the tabular comparison of data, the tabular comparison of similarity coefficients, the dendretic diagram and the hier-archical agglomerate--were tried for a comparatively objective classification of the thirteen forest communities of the Jinyun Mountain. The point ordinational chart shows directly the distribution of the thirteen communities. It reflects the gradient variation of the habitat, and correspondingly reflects the pattern in which the gradual transition to the climax communities is contained, namely the successional series of Communities. The evergreen broad-leaved forest is a relatively stable climax community type suited with local environment.All numerical classification methods are only enlightening, quantitative analysis must be closely integrated with qualitative analysis of ecological approach in the study Of the vegetation ecology. This paper is the first attempt to apply this comprehensive analysis to the study of the forest communities of the Jinyun Mountain.