Abstract:Evergreen forest is the natural vegetation in the eastern part of subtropical zone of China. This study area was in the northwestern part of Zhejiang Province where the dominant tree species based on 44 sample plots were Cyclobalanopsis glauca, Lithocarpus glaber, Castanopsis eyrei, Schima superba, Castanopsis sclerophylla and so on. The Weibull fuctiion could flexibly express the D.B.H. distributions of the evergreen broan-leaf forest with varied skew and kurtosis distributions. With the increase of stand diameter (D), the D.B.H. distributions of the evergreen broad-leaf forest could be expressed by curves that changed from exponential to inverse-J, and finally to normal shapes. The skew degrees tended to change from positive to negative, and kurtosis degreased gradually with an accompanying increase in the modes. Using parameter estimation methods, the models and schedules, in which D was used as independent variable, of the dynamic D. B.H. distributions of the natural uneven-aged evergreen broad-leaf forest were established. These models can be used for the reasonable management of forest resources.