Integrated precast pump stations are widely used in municipal engineering, industrial, and other buildings where wastewater cannot be directly discharged into a wastewater treatment system relying on gravity. Among them, municipal drainage is applicable to intermediate pump stations such as sewage pump stations, drainage pump stations, and combined flow pump stations. The glass fiber reinforced plastic (GRP) integrated precast pump station is an ideal solution to replace traditional drainage pump stations and is a type of integrated pump station. The cylinder of this pump station is made of advanced thickened mechanical winding GRP material. The internal water pumps, pipelines, valves, instruments, control equipment, and other accessories required by users are provided as a complete set, and are installed and tested before shipment. The GRP integrated pump station is a new type of integrated pump station equipment that is easy to use, reliable in quality, requires minimal civil engineering work, and has a low cost. Volume optimization is a significant feature of this pump station.