Abstract: The plant vegetation type in Tongtieling area of Hainan is tropical lowland rain forest.The variation of its vertical distribution is not distinct.The spermatophyte flora consists of 1243 species in 664 genera and 161 families.In the level of genera,it is predominated by tropical elements,pan-tropical one and the tropical Asia one occupied 28.64% and 28.01% of total genera respectively.In the level of species,the tropical elements predominated in all ones.The species endemic to China of seed plant in Tongtieling are abundant,account for 22.65% of total species.There are 121 species endemic to Hainan in this area,account for 43.37% of the total species endemic to China in this area.The floras of Tongtieling and other 4 areas are compared.