This paper takes a new container terminal project in Senegal as an example to explore the layout scheme of spur breakwater under swell conditions and its impact on waves at the front of the terminal.Through wave mathematical model experiments,the effects of different spur breakwater lengths on the waves at the terminal front are compared and analyzed,and the downtime under each scheme is calculated.The results show that the length of the spur breakwater has a significant impact on the shielding effect of waves in the harbor,and longer breakwater support can effectively reduce downtime.Specifically,the downtime for Scheme 1 (with a spur breakwater length of 323 m) is 0.7%,for Scheme 2 (with a spur breakwater length of 120 m) is 2.23%,and for Scheme 3 (without a spur breakwater but with adjusted channel bottom elevation) is 1.47%.The study also found that when other conditions（such as raising the dock front berthing water area,harbor basin,and outer channel）are adjusted,even if the breakwater support is cancelled,it may still achieve a good shielding effect.This research provides a reference for the design of breakwaters in similar port projects and offers insights for the construction and optimization of breakwater schemes under long-period wave conditions in the future.