Abstract:Water environment control focuses on the source. The partial industrial factories built a long time ago are one of the pollution sources more difficult to treat. Taking an industrial factory in Shanghai as an example, the measures of sewage and wastewater separation, pollutant interception, source control, interface expansion, rainwater and sewage separation, and spongificaiton of underlying surface by stages are discussed under the premise of doing a good job in the current situation and sorting out the problems. Giving consideration to policy implementation and enterprise needs, the design thinking of pollutant interception, source control and drainage system reconstruction is discussed.