This　article　investigates　the　complex-coupled　response　of　a　cross-sea　floating　bridge　under　the　combined　actions　of　seismic　loading　and　wave　at　different　incident　angles.　The　bridge　structure　is　modeled　using　the　finite　element　method,　considering　the　interaction　between　the　girder,　pier,　pontoon,　and　mooring　chains.　Wave　forces　are　calculated　based　on　potential　theory,　and　an　added　mass　approach　is　applied　to　simulate　the　hydrodynamic　forces　induced　by　the　earthquake.　Simulations　were　conducted　using　a　1-year　random　wave　at　three　different　incident　angles　of　0o,　45o,　and　90o,　combined　with　three-dimensional　seismic　loading　of　varying　magnitudes:　0.3,　0.5,　and　1　g.　The　simulation　results　indicate　that　the　direction　of　the　incident　wave　significantly　influences　the　bridge＇s　response.　The　coupling　effect　between　wave　and　seismic　forces　on　the　floating　bridge＇s　response　is　not　simply　additive.　Generally,　when　the　earthquake　magnitude　is　low,　the　wave　loading　significantly　impacts　the　bridge＇s　dynamics.　However,　as　the　earthquake　magnitude　increases,　the　bridge＇s　response　becomes　dominated　by　the　seismic　forces,　rendering　the　influence　of　wave　forces　negligible.　　©　2024　The　Author(s).