Huajing Harbor Sewage Pumping Station and River Improvement Engineering Section No. is SST1.3. The purpose of the construction of this project is that: the sewage holding capacity of the already built trunk sewage system in the area of Bailonggang Sewage System and the treatment capacity of Bailonggang Sewage Treatment Plant are becoming saturated, especially the connecting pipe on Luoshan Road has become the bottleneck of the whole sewage conveyance system, and it is urgently needed to improve and build new sewage conveyance pipelines to alleviate the increasingly obvious contradiction between the already built trunk line There is an urgent need to improve and build new sewage conveyance pipelines to alleviate the contradiction between the conveyance capacity of the built trunk lines and the actual water volume, to share the conveyance pressure of the central line in the Bailonggang area, and to improve the spatial layout of the sewage system in the Bailonggang area and the central city.