In order to reduce the quarry-run quantities of traditional sloping riprap,a research about deep water sand-core breakwater has been conducted.Based on the optimization design process of the cross section of sand-core breakwater in a practical engineering project,a comparative analysis has been adopted among design section selection,construction feasibility,cost and overall stability under high tidal range.The results show that the sand-core breakwater sections with rock bund can fulfill the project design requirements under the high tidal range conditions,and the conclusion can provide a reference for the similar projects.