This paper, which on the basis of analysis of hydrology and sediment data, uses the numerical simulations of coastal landforms and tidal current, physical model tests and other technical means to research the plane program of an offshore artificial island on the silty shore. The study result indicates that the impact of the artificial island on flow field is restricted within a scope of 500 m to the south and north as well as 1 500 m to the east and west. The island layout is adapted to the tidal current and wave conditions, while the island protection measures,such as submerged protecting dike, long and short bed protections, etc., are effectively applied, and thus the layout scheme is appropriate and feasible.