Abstract: This paper deals with the types and their distribution of the grassland in Hainan Island. Twenty seven communities have been distinguished so far according to dorminance. In these communities. 4 types are determined according to PCA.Most of the communities are secondary, which include the communities that have a savanna-like physiognomy in the western part of the island. Leptocarpus disjunctus community is primary and distributed in areas with special soil conditions. Soil fertility and water condition are the most important factors in determining the distribution of the grassland types.