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在线路调查和样方调查的基础上分析了广东天井山山地常绿阔叶林的结构特征。天井山山地常绿阔叶林外貌终年常绿，群落的区系组成以亚热带的科属为主，优势科为壳斗科，八角科、山茶科、樟科、冬青科、安息香科、杜英科、木兰科、山茱萸科、蔷薇科等，优势种类亦大部份由这些科的种类组成。群落中胸径≥３ｃｍ的个体密度为４２８４株／ｈｍ２，密度要比相邻的八宝山山地常绿阔叶林高。群落较为低矮，平均高约７～８ｍ，乔木层垂直分化不明显，具山顶矮林的特色。群落缺乏板根现象和层间植物，表现出中亚热带森林的特征。天井山山地常绿阔叶林分布在近主峰的四周，海拔较高，而邻近的八宝山自然保护区相同海拔处的植被已为山地草坡所取代，因此，应对这片山地常绿阔叶林加以严格的保护，以防其逆行演替。
Based on the survey of the line and the sample survey, the structure characteristics of the evergreen broad-leaved forest in the mountainous area of Mt. The perennial evergreen broad-leaved forest in the evergreen mountainous area of Tianjing Mountain is dominated by subtropical families and the dominant families are Fagaceae, Aniseed, Camellia, Lauraceae, Ilex, Coptidis, Magnoliaceae, Cornusceae, Rosaceae, etc. Most of the dominant species are also composed of these families. The population density of individuals with DBH ≥3cm was 4284 plants / hm2, which was higher than that of the adjacent Babaoshan Mountain evergreen broad-leaved forest. Community is relatively low, with an average height of about 7 ~ 8m, vertical differentiation of tree layer is not obvious, with the characteristics of the top dwarf forest. The lack of rooting and interpland plants in the community showed the characteristics of the subtropical forest. The evergreen broad-leaved forests in the mountainous mountains of Pai Mountain are distributed around the main peak and have a high altitude. The vegetation at the same elevation at the adjacent Babaoshan Nature Reserve has been replaced by the mountain grass slope. Therefore, the evergreen broad- To be strictly protected to prevent its retrograde succession.