With the planning and development of international tourism in Hainan island, we plan to expand the land space at the new sea port area along the west coast of Haikou by building an artificial island to construct an international tourism ecological harbor, cultural exchange and hydrophilic space,business of international highend residential area and modern service industry gathering area. Based on the analysis of the function orientation, we investigate the pattern and functional layout of the dolphin island and propose the layout program.