In the present paper,the research improvement of the eco industrial parks in several countries is briefly reviewed. As embryo of eco industrial park,Kalundborg Industrial Symbiosis is introduced.Its environmental and economic benefits per year are presented (Table 1).The definition and the development model of eco industrial park is discussed.And the key steps to setup eco industrial park are also described.The characteristics of some eco industrial parks located in United States (Table 2) and Canada (...