Abstract:The underpass in Jinxiu Road of Wenzhou is located at the intersection of two main traffic roads in the central city. Its surrounding urban land is in shortage. As a subsidiary facility, it is difficult to acquire land for the rainwater pumping station. In the design, the three-dimensional space of the city is fully utilized. Combined with the underpass tunnel, the pump station is designed to be completely underground. The division of catchment area division, the scale determination of pumping station, the site selection of pumping station, the process of pumping station and the auxiliary designs of ventilation, power supply and automatic control for this rainwater pumping station are introduced in detail. The engineering experience is accumulated for the similar projects, and has certain reference significance.