Abstract:  Convenience of information exchange and comprehensiveness of information acquisition in big data era will affect the paradigm of scientific research However, big data technology not only has  significant impacts on natural science research, but also has very important implications for the empirical study of law At present, China′s environmental protection public participation system has been implemented for two years, but the effect is in a dilemma The main difficulties lie in the collection of legislation data, high system implementation costs and insufficient effective assessment on legislation. So big data technology is introduced to provide some enlightenment for legislative study and public participation in environmental protection With big data analysis techniques of regression analysis, k-nearest neighbor and decision tree algorithm, specific estimate is given in order to guide the practice   

Key words:  big data, public participation in environmental protection, institutional cost