Community biodiversity research has been attracting much attention. Dinghu Mountain is rich in vegetation resources. It is very meaningful to compare and explore the species diversity of its typical plant communities and satellite plots. In this study, 20 hm² plot and five 1 hm² satellite plots in Dinghu Mountain were both used as research objects for the first time, analyzed and compared from the aspects of species area relationship, alpha diversity and beta diversity. Research findings are as follows. (1) After 10 years of renewal succession, abundance of 20 hm² south subtropical evergreen broad-leaved forest(DingHu Shan large-scale plot) showed an explosive growth in 2015. The total number of individuals among five 1 hm² satellite plots varied greatly. Sort by number of individuals:plot 1 > plot 3 > plot 5 > plot 4 > plot 2. (2) 20 hm² plot was not saturated with species, and the surrounding satellite plots can effectively complement and represent species in the region. (3) The DHS large-scale plot has a higher alpha diversity. Among satellite plots, plot 2 had the highest species diversity, followed by plot 3, plot 1 and 4, and finally plot 5. The diversity index of plot 2 was relatively large, due to there were large number of large trees and giant trees in plot 2. The results of other plots showed a positive correlation between altitude and diversity, except plot 2. (4) The DHS large-scale plot and its satellite plots were in the similar succession stage, so the species similarity was the highest. The difference between DHS plot and its satellite plot 4 (Pinus massoniana forest) in succession stage was the farthest, so the species difference was also the largest, bray-curtis index detected only 5% of the species were same. The β diversity test between satellite sites shows that:the succession stages of south subtropical evergreen coniferous forest (Pinus massoniana forest) and south subtropical coniferous broadleaf mixed forest were similar, with the highest species similarity, and the bray-curtis index showed 84% of the species were same. Therefore, it is not only necessary to calculate the DHS plot, but also to consider the surrounding satellite plot as a whole, so as to obtain the diversity characteristics of the whole community in Dinghushan National Nature Reserve more completely.