本文首次报道拟建云南省沾益海峰自然保护区中的地下森林概况。该地下森林在特殊环境下形成 ,受天然屏障保护 ,保存着较完整的原生植被类型。因其稀少、集中、面积广、深度大 ,是省内独有 ,国内外罕见的。作者对其有别于地上生态环境的物种资源、特殊的植被类型、异常的区系成分、变化较大的生态梯度和完整的林层结构等生态特征进行了分析 ,认为该地下森林具有较高的科研价值 ,是独具特色的自然景观和不可多得的自然遗产 ;亦提出了需要对其生态环境、地质年代深入研究的问题 This article reports for the first time about the underground forest in Zhanyi Haifeng Nature Reserve in Yunnan Province. The underground forest is formed in a special environment, protected by a natural barrier, preservation of a more complete type of native vegetation. Because of its sparse, concentrated, large area, depth, is unique in the province, rare at home and abroad. The author analyzed the ecological characteristics of the underground forest, which is different from the above-ground ecological environment, the special vegetation types, the abnormal fauna components, the changing ecological gradient and the complete forest structure. Of the scientific value, is a unique natural landscape and rare natural heritage; also proposed the need for its ecological environment, the geological era of in-depth study of the issue