With the rapid development of urbanization, the problems of urban flood control and drainage have become increasingly prominent. In view of the problem that the existing pumping stations′ drainage capability goes down with a low construction standard but a new project takes a long time and affects landscape, this paper proposed a new assembled underground drainage pumping station with the advantages of quick construction, simple structure, and beautification of the environment. With an application example of the new pumping station, the three-dimensional finite-element model was established based on software ABAQUS and the static and dynamic characteristics of the structure were analyzed. The results showed that the new pumping station has good mechanical properties whose structure has good mechanical properties, with small and uniform settlement, low stress level and reasonable structural force. A proper amount of reinforcement is required in the area of tensile stress concentration. The displacement response in seismic conditions is analyzed. The results show that the displacement response value is low, the vibration amplitude is small, the deformation of the structure is small, and the concrete damage is of small range, which indicates that the pumping station has good anti-seismic performance.