Abstract: There are several tendencies in community forest under different management by using vegetation sampling method and agro-biodiversity assessment method of PLEC BAG guidelines. The results show: (l) The forms of community forest manage-ment become more and more variable with multiple factors, such as: policy, traditional customs; (2) With the intensity of the management declining, the indexes of biodiversity are increasing in tree layer and herb layer, but that of shrub layer is decreas-ing. (3) The timber volume is increasing with the species decreasing, in tree layer. Get to know the regulation between commu-nity forest management and it' s biodiversity is helpful and urgent for conservation the forest and biodiversity.

Key words: Gaoligongshan