Abstract:Southern cities with high rainfall, dense river networks, abundant groundwater and mountain springs, it is difficult to improve the quality and efficiency of urban domestic sewage treatment. Through the investigation of the current sewage system, Zhangzhou City gradually established a "source management, both the symptoms and the root cause, the table as one" governance ideas. In order to eliminate the impact of rainwater and clear water on the sewage system, the drainage unit as a unit to promote the separation of rainwater and sewage, clear water and sewage separation, and thus promote the quality and efficiency of urban domestic sewage, and achieved significant results. The treatment route and the practical effects of Zhangzhou city improving municipal wastewater treatment quality and efficiency, can provide reference for the southern cities to promote urban improving municipal wastewater treatment quality and efficiency.