With　the　increasing　construction　of　undersea　tunnels　in　seismic-prone　areas,　accurately　assessing　their　response　to　seismic　conditions　is　crucial.　To　grasp　the　dynamic　response　of　undersea　tunnel　structures　to　seismic　waves,　the　shaking　table　test　of　water–sea–sea　submarine　tunnel　is　designed　and　carried　out　based　on　the　methods　of　orthogonal　design　and　fuzzy　method.　A　comprehensive　time-domain　model　is　developed　to　capture　the　nonlinear　dynamic　interaction　of　ocean　engineering　structures,　taking　into　account　seismic　waves,　seawater,　and　saturated　soil.　The　research　results　show　that　as　the　burial　depth　at　each　measurement　point　of　the　submarine　tunnel　increases,　the　acceleration　response　decreases　and　the　horizontal　displacement　relative　to　the　seabed　surface　increases.　Comparing　test　and　finite　element　simulation　results　reveals　that　under　seismic　loading,　the　strain　distribution　pattern　of　the　tunnel　section　is　mainly　in　the　arch　shoulder,　waist,　and　foot　with　larger　strain　peaks,　whereas　the　strain　peaks　at　the　arch　top　and　the　superelevation　arch　are　smaller.　Simultaneously,　doubling　the　water　pressure　induces　a　slight　increase　in　the　overall　strain　response　peak　of　the　tunnel,　with　an　indistinct　relative　displacement　change　rule.　When　a　vertically　polarized　shear　wave　(SV　wave)　is　vertically　incident,　different　dynamic　response　indices　will　have　different　trends　with　the　change　in　water　level.　This　study　may　provide　a　reference　for　shaking　table　tests　for　saturated　soil–submarine　tunnels　at　complex　sites.　©　2024　by　the　authors.