Abstract:Rainwater and sewage separation is an important research topic in China's drainage industry. This paper analyzes the current status and existing problems of rainwater and sewage separation treatment models, and proposes a new dual-flow model of rainwater and sewage separation at different times. This paper discusses and studies the concept and implementation path of the dual-flow model of rainwater and sewage separation at different times, and establishes a new dual-flow model of rainwater and sewage separation based on the effectiveness of wastewater collection from five paths. It innovates the performance evaluation system and enhances the efficiency control, and adopts digital means to carry out engineering management. It also proposes a new model of reverse sewage treatment, which will transform sewage treatment from a ranking based on total volume to a ranking based on effectiveness. By analyzing a drainage case in a village town, this paper verifies the effectiveness of the model and provides reference for the drainage industry, promoting the sound development of China's drainage industry.