Abstract:Southern cities generally face the problems such as low sewage treatment efficiency, high water level operation of sewage pipelines, and black and odorous river surges. However, the heavy rainfall, well-developed river networks and abundant groundwater make the improvement of the quality and efficiency of urban domestic sewage treatment more difficult. Taking the drainage system in Zengcheng District of Guangzhou as an example and combined with the three-year action plan for improving the quality and efficiency of urban sewage treatment, and the need to achieve the long-term improvement of urban water environment, taking the sewage collection scope of wastewater treatment plant as the system element, the problems existing in the system are completely checked, sorted out and analyzed from the source to the end. The treatment strategies are formulated, and the work ledger is built. Through the gradual implementation of multiple engineering and non-engineering measures, the goal of improving the sewage treatment efficiency has been achieved, which provides a reference for the improvement of the quality and efficiency of sewage treatment in the other southern towns.