Tsunami,　as　a　severe　marine　disaster,　significantly　affects　the　safety　of　livelihoods　and　infrastructure　in　coastal　communities.　To　address　the　problems　of　large　deformation　and　fracture　in　coastal　structures　under　fluid-impacting,　as　well　as　the　large-scale　ratio　between　the　tsunami　and　the　structures,　we　employ　smoothed　particle　hydrodynamics　(SPH)　and　peridynamics　(PD)　to　respectively　describe　fluid　flow　and　solid　structure　damage.　A　disguised　ghost　particle　coupling　scheme　treating　PD　particles　as　virtual　particles　is　adopted　to　construct　the　fluid–structure　interaction.　A　non-uniform　discrete　of　SPH　method　is　utilized　to　solve　a　large-domain　water　flow　problem,　with　particles　near　solid　regions　smoothly　transitioning　to　a　refined　distribution.　Meanwhile,　PD　employs　an　even　more　refined　particle　discretization　approach.　Considering　the　different　stable　computational　time　steps　for　solids　and　fluids　in　explicit　time　integration,　a　coupled　time-integration　scheme　for　fluid–structure　interaction　that　allows　for　different　time　steps　is　proposed.　Based　on　these　algorithms,　the　efficacy　and　correctness　of　SPH-PD　in　simulating　the　impact　of　tsunami　on　solid　structure　is　validated　through　a　series　of　numerical　examples.　These　examples　include　the　failure　analysis　of　fluid–structure-foundation　interaction,　the　convergence　analysis　of　tsunami　impacting　pressures,　and　the　failure　analysis　of　solid　structures　by　fluid–structure-foundation　interaction.　©　2025　Elsevier　Ltd