A plot(100m×100m)was set up in the evergreen broad-leaved forest in Nanling Dadingshan Nature Reserve for long-term monitoring of the plant biodiversity. On the basis of investigation to each, this study examined the physiognomy, structure, florists, species diversity of the community for all plants with DBH>1 cm, and all shrub and herbs in 25 auadrates(5m^*5m) within the plot. The results showed that the forest have characteristics of rich in species of Lauraceae and Fagaceae. and should be named of "Machilus chinensis、Cryptocarya chingii and Meliosma thorelii community". There are rich species diversity in the community, especially for the tree layer(DBH>1cm). Results further suggests that, the community has high conservation values and should be studied for the mechanism of rich species biodiversity.