在大量的群落样方调查基础上 ,利用二元指示种分类法 ( TWINSPAN)对三峡大老岭地区的森林群落进行数量分类 ,并据此划分该地区山地植被垂直带的高度范围 ,讨论了TWINSPAN方法的特点及其应用于结构复杂的亚热带森林时应依据的原则。最后 ,文章总结了大老岭地区的森林群落类型。 Based on a large number of plots of community sampling, the dichotomous indicator species classification (TWINSPAN) was used to quantitatively classify the forest communities in the Dalaoling area of ​​the Three Gorges. Based on this, the vertical range of the mountainous vegetation in this area was divided, and TWINSPAN The characteristics of the method and its application to the complex subtropical forests should be based on the principle. Finally, the paper summarizes the forest community types in the Dalaoling area.