Floating breakwaters can provide effective protection for marine engineering equipment and meet the increasing protection needs of offshore facilities.Computational fluid dynamics method is used to numerically simulate the wave dissipation performance of floating breakwater with wing plates,and the influence of wing plate parameters on wave dissipation effect and vortex distribution of the breakwater is analyzed.The research results show that when the angle of the wing plate is too large the strength of the vortex generated at the tip of the wing plate becomes smaller,and the wave dissipation performance of the breakwater is reduced.When the wave height is large,the reduction of the wing plate angle makes the vortex shedding time longer,thus improving its wave dissipation performance.The shorter length of the wing plate accelerates the shedding of vortex,resulting in the reduction of its wave dissipation performance.