Abstract: After China had been a member of WTO,along with subscribing of the ,the tropical fruit industry in Hainan will be faced with the challenge of the market of national and international,exerting the comparative advantages of the tropical fruit sufficiently had been the consensus of the development of Hainan economy.Along with the improve of the standard of living,the demand for tropical fruit will be strict than ever,the planting structure of primary products will be faced with adjusting too,how to adapt the needs of the market,and exerting the comparative advantages of the tropical fruit sufficiently will be very important.This paper based on the comparative advantages,calculating the comparative advantages of the tropical fruits in Hainan province,meanwhile,this paper also puts farward some suggestion on the development of the tropical fruit industry in Hainan province.