The species composition, floristic elements, community structure and species diversity of Rhododendron fortunei communities in Jinggang Mountain were analyzed, according to the statistics from 10 sample plots. The result showed that there were 83 species of vascular plants in these communities of Rhododendron fortunei (including varieties), belonging to 44 families and 67 genera, in which the pteridophyte accounted for 6 families, 6 genera and 6 species, the gymnosperm 4 families, 4 genera and 5 species, and the angiosperm 34 families, 57 genera and 72 species. The floristic analysis showed that the flora geographical elements were complex, the tropicail element and temperate element took a large proportion. Communities of Rhododendron fortunei was many storied all-aged forest, Rhododendron fortunei, Daphniphyllum macropodum and Rhododendron simiarum were the constructive species. The Rhododendron fortunei communities in Jinggang Mountain had high Simpson index and Pielou index，low Shannon-Wiener index and Richness index. There were some differences of species diversity among plots, and the variation patterns of species diversity index which was ever used were discordant among layers.