The article uses multiple-factor method, Lorenz curve, comprehensive pollution index and Borda law analyzing the spatial and industrial distribution traits, studying the reasons, discussing strategic ways to further building of eco-province in Hainan. All study is based on the data form 2004 water environmental report of Hainan province and sticks to the national standard of water quality. By calculation and analysis, the article divides the province into three water pollution areas: low pollution area, middle pollution area and high pollution area. And colludes that (1) water pollution distribution on Hainan Island is uneven spatially; (2) waste water is the main source of water pollution; (3) economical development, population distribution, natural environments and the way of land usage have great impact on the format of water pollution distribution on the island. At the end, the article puts forward some strategies of building eco-province in Hainan.