Based on the three-dimensional potential flow theory, the finite depth Green's function and the coupling dynamic analysis method, the hydrodynamic analysis was carried out for a new type of offshore leisure platform. The inherent characteristics and wave response of the platform in the shallow water environment are obtained by comparing the RAO when the platform is located in the water depth of 20 to 50 meters and 300 meters. Considering the combined effects of wind, waves, and currents, three mooring schemes were designed for time-domain coupled analysis. By comparing mooring tension, touchdown, and air gap analysis, a preferred mooring scheme was selected. The research findings of this paper have certain reference significance for the mooring design of floating platforms in shallow water areas.