1400m2 plots in a Castanopsis carlesii forest at Luoba, Shixing county, north of Guangdong Province, were surveyed. Importance value, species diversity index (Shannon-Wiener Index), evenness index, ecological dominance of the community in relation to thent layers, i. e. tree layer, shrub layer,herbaceous layer and interlayer, were computed. Growth volume of the dominant species Castanopsis carlesii was also measured and calculated. Results showed that Shannon-Wiener Index of tree layer, shrub layer, herbaceous layer and inter-layer were 2.024 8, 2.902 1, 2.903 4 and 2.269 8 respectively;evennss index were 0.391 6, 0.549 1, 0.605 1 and 0.756 6 respectively; ecological dominance were 0.394 6, 0. 150 3, 0.217 1 and 0.241 5 respectively. This study can provide theoretical foundation for the management of Castanopsis carlesii forest.