Economic law’s regulative range is one of the most attractive basical questions in economic law field in the past many years Through earnest introspection, I think the essential standard to divide legal department is interest, and it isn’t the regulative object and method Different interest requirements in different historical period bring up different legal departments Social holistic interest is the essential attribute of economic law One legal department, in order to fulfill the request of certain interest, often adjusts different kinds of social relationships One kind of social relationship,because it carries different interest, often needs different legal departments to adjust, the relationship of economic law, civil Law and advninistrature law is alike. They all push the hurmonious developemnt of the social economy together.