Abstract: The tropical forests of Jianfengling, Hainan Island can be divided into four vertical vegetation belts and six vegetation types.In the vegetation types, there are fifteen groups of forest-type classified according to the dominant undergrowths and their development status and specific abundance, and twenty five forest types classified according to similarity in species composition and abundance of the undergrowth, the living ground and the out layer of the forest, similar ecological conditions, similarity in the first tree layer in the dominant species or genera, and in the subdominant species or genera and accompanying species or genera.