Urban old road rain sewage pipe network transformation system and method thereof

The invention discloses a rainwater and sewage pipe network transformation system and method of an urban old road, and relates to the technical field of rainwater and sewage pipe network transformation, the rainwater and sewage pipe network transformation system comprises a sidewalk, a green belt, drainage grooves, drainage covers, reinforcing columns, well lids and a sewage treatment plant, the reinforcing columns are evenly installed on the two sides of the sidewalk, and the drainage grooves are formed in the reinforcing columns; a drainage cover is installed at the top of the drainage tank, a well groove is formed in the top of the sidewalk, a well lid is installed at the top of the well groove, and water storage mechanisms are installed at the bottoms of green belts on the two sides of the well lid; the box body and the auxiliary box are buried at the bottom of the green belt, the drainage capacity of the whole sink is improved, when a drainage pipe connected with one end of the whole sink is blocked, the