In　recent　years,　most　research　on　typhoons　in　the　Taiwan　Strait　and　its　adjacent　waters　has　focused　on　simulating　typhoon　waves　under　the　influence　of　wind　fields.　In　order　to　study　the　influence　of　tidal　level　changes　on　typhoon　waves,　a　numerical　model　was　established　in　the　Taiwan　Strait　based　on　the　third-generation　ocean　wave　model　SWAN.　The　simulation　results　of　the　tide　level　during　the　corresponding　typhoon　landing　time　were　incorporated　into　the　model　to　optimize　its　performance.　Subsequently,　the　wave　height　of　the　typhoon　landing　at　the　lowest　tide　level　was　compared　with　that　at　the　highest　tide　level.　This　comparison　serves　as　a　reference　and　warning　for　ocean　engineering,　highlighting　the　hazards　of　the　typhoon　landing　at　high　tide.　The　simulation　results　were　verified　and　analyzed　using　the　measured　data　of　significant　wave　heights　and　wind　speeds　when　typhoons　Mekkhala　(2006)　and　Maria　(0607)　approached.　The　results　show　that　after　optimization,　the　relative　error　of　the　significant　wave　peak　is　reduced.　Furthermore,　there　has　been　a　decrease　in　the　maximum　wind　speed,　bringing　it　closer　to　the　measured　value.　These　improvements　signify　enhanced　model　accuracy.　The　tide　level　has　a　great　influence　on　the　typhoon　wave,　and　the　tide　level　height　at　the　time　of　the　typhoon　landing　is　positively　correlated　with　the　significant　wave　height　of　the　waves　generated　by　the　typhoon.　When　the　typhoon’s　landing　time　coincides　with　the　high　tide　level,　the　resulting　waves　are　significantly　higher,　reaching　up　to　0.71　m.　This　has　a　substantial　impact　on　the　safety　of　marine　structures,　particularly　breakwaters.　©　2023　by　the　authors.