Wave is the controlling factor in the structural design of a pontoon for a yacht wharf. Given the complex motion and stress conditions of a spring anchorage concrete pontoon in waves，we focus on an actual project to summarize the general ideas and principles of selecting buoyancy tanks and anchorage structures for the yacht wharf. Then，we investigate the application conditions of the spring anchorage concrete pontoon and the main points in the structural design of such a concrete pontoon and use the finite-element method to analyze the motion response and structural stress characteristics of the concrete pontoon in waves. The results show that three-dimensional finite-element numerical analysis can be performed to analyze the wave response characteristics of such pontoons when the wave height exceeds 0.5 m and that this issue should be given due consideration in the general layout and detailed structural design of this type of pontoons.