In　addition　to　seismic　waves,　coseismic　displacement　is　also　generated　during　earthquake　events,　which　decreases　gradually　away　from　the　seismogenic　fault　and　may　bring　damages　to　tunnels　in　the　area.　This　study　aims　to　investigate　the　nonlinear　response　of　tunnels　under　coseismic　displacement　induced　by　strike-slip　fault.　First,　a　method　for　applying　coseismic　displacement　on　the　finite-element　model　(FEM)　is　developed　by　converting　the　displacement　into　equivalent　nodal　forces　applied　on　the　element　nodes.　Then,　the　nonlinear　response　of　the　tunnel　under　coseismic　displacement　is　numerically　investigated,　considering　the　influence　of　the　angle　of　the　tunnel　axis　with　respect　to　the　fault　trace,　the　epicentral　distance,　and　the　earthquake　magnitude.　The　numerical　results　show　that　the　tunnel　might　suffers　tensile　damages　under　coseismic　displacement　induced　by　the　strike-slip　fault,　which　indicates　the　coseismic　displacement,　as　one　kind　of　earthquake　loads,　should　also　be　considered　in　seismic　analysis　for　tunnels.　Moreover,　some　other　conclusions　can　be　drawn:　(1)　The　tensile　deformation　of　the　tunnel　increases　first　and　then　decreases,　as　the　tunnel　axis　changes　from　being　perpendicular　to　the　fault　trace　to　being　parallel　to　the　fault　trace,　which　is　converse　for　the　shear　deformation;　(2)　the　damage　degree　on　the　tunnel　lining　increases　first　and　then　decreases　while　the　epicentral　distance　increases;　(3)　with　an　increasing　earthquake　magnitude,　the　tunnel　damage　increases　dramatically.　This　study　offers　an　insight　into　further　research　on　tunnel　response　under　coseismic　displacement.