The integrated value of the ecological function of tropical forests in the central mountainous areas of Hainan Island was 33.0648 billion yuan•a-1 in 2010 (soil improvement, soil consolidation, soil nutrient maintenance, water storage and moisture regulation, water purification, carbon sequestration, oxygen releasing, air purification, biodiversity conservation, eco-tourism), equivalent to 16.1% of GDP in Hainan Province this year (205.212 billion yuan). The tropical forests in the central mountainous areas of Hainan Island make great contribution to Hainan Island's ecology, and play an important role in maintaining the stability of the ecological environment in Hainan Island. Through the understanding of major ecological function value of tropical forests, it is necessary to make people cherish the tropical forests in the central ecological function conservation areas of Hainan Province, and spontaneously throw themselves into the ecological environment protection and construction, to promote the rapid and sustainable development of construction in Hainan Province as an international tourism island.