Abstract: By using 35 years data of 14 weather stations from 1971 to 2005 in Hainan and contrasting with main climatic index and climate condition for sugar cane cultivation and growth,hydrothermal condition of different region was analyzed in Hainan.Meanwhile,climate suitability was appraised.The results showed that the meteorological factors had little difference,and precipitation was the key factor for sugar cane cultivation.All regions were suitable to sugar cane planting except Dongfang city for precipitation<1000mm.Baisha,Qiongzhong,Dunchang,Wanning,Qionghai,Danzhou were the best regions,as the others were better regions.

Key words: Hainan, Sugar cane, Climate suitability, Regionalization