Along with the high speed development of economy and society in the developed area in China,the quantity of water pollution emissions increased sharply to a degree well beyond the regional water environmental capacity.The water environment has been deteriorated continuously and becomes a restrict factor to regional development.Taking the basins as a basic spatial unit,this paper discussed both sides of supply ability and demand conditions of water environmental capacity comprehensively,and proposed a method of total index allocation of water environmental capacity include regionalization technique and vector space model.Moreover, taking Wuxi City as an example,this paper proposed multi-scene configuration program of water environmental capacity.First,Gini coefficient method was used to measure the fairness of different programs.Then optimization of different programs was carried out,and the scientificity and operability of allocation scheme were enhanced.As a whole,the central city and northeast region had been allocated more water environmental capacity quantity than the upriver of Lake Taihu and the region along the Wangyu River.The results provide a scientific basis for harmonizing the relationship between regional industrial development and water environment, and policies-making of differentiated industrial access.