National Structural Design Contest for College Students is the highest-level discipline contest for learners of Civil Engineering, which aims to cultivate and enhance their innovative spirit, group consciousness and practical abilities. Compared with previous contests, the 10th National Structural Design Contest for College Students paid more attention to hardness and softness, limitation on mid-span deflection except its previous request on sufficient capacity. Based on the grand prize work of the 10th National Structural Design Contest for College Students, this thesis mainly makes an analysis on its choice of structural styles, and optimization methods of structure. The study of structural design and optimization methods of the grand prize work in this thesis may provide some reference value for structural design contest in the future.