It is the foundation of controlling pollution to research into the present situation of water pollution. On the basis of an onthespot investigation over the present situation of water pollution in Liuyang River,the paper applies Fuzzy Mathematic method to evaluating its water quality and to classifying its pollution into four sections (Tieshanchiao, Xiaoxi, Shanshuichang and Hanjiagang), namely: Type Ⅴ,Ⅳ,Ⅰand Ⅲ. Then the paper puts forward some proposals on harnessing the river comprehensively according to the characteristics ...