Abstract: Based on the requirements of the 18th National College Students' structural design competition, taking the wupeng boat as the research object, the lightweight structural design and mechanical analysis were carried out under the combined conditions of wave excitation and vertical static load. Midas civil NX is used to establish the finite element model, and the strength, stiffness, stability and dynamic response of the structure under various load conditions are simulated and analyzed. Through the selection and optimization of multi wheel structure, the design scheme of wupeng boat was determined, and on this basis, 98.61g lightweight high-strength model and experimental loading were completed. The results show that the model has good bearing performance and navigation stability under the combined action of vertical static load and wave excitation, which provides a theoretical basis and practical reference for the design of similar offshore structures.