In　addition　to　seismic　waves,　coseismic　displacement　was　also　generated　during　earthquake　events,　which　might　bring　severe　damage　to　tunnel　structures.Based　on　the　dmax　model　for　coseismic　displacement　by　Lee　as　well　as　the　idea　of　integral　response　displacement　method,　the　numerical　analysis　method　for　circular　tunnels　under　coseismic　displacement　due　to　strike-slip　fault　was　developed　first.　Then,　the　response　of　tunnels　subjected　to　coseismic　displacement　was　numerically　investigated.Moreover,　the　effects　of　the　earthquake　magnitude,　the　angle　of　tunnel　axis　relative　to　the　fault　trace,　the　fault　dip　angle　and　the　epicentral　distance　were　studied.By　the　numerical　results,　some　conclusion　can　be　drawn　as:(1)The　tunnel　might　suffer　significant　internal　forces　and　deformation　under　coseismic　displacement,　which　indicates　that　the　coseismic　displacement,　as　a　kind　of　earthquake　loadings,　should　also　be　considered　in　seismic　analysis　for　tunnels.(2)The　axial　force　that　the　tunnel　suffers　increases　first　and　then　decreases　with　changing　the　tunnel　axis　from　being　vertical　to　the　fault　trace　to　being　parallel　to　the　fault　trace,　while　that　is　converse　for　the　shear　force.(3)The　tunnel　internal　forces　increase　with　the　earthquake　magnitude,　and　increase　first　and　then　decrease　with　the　epicentral　distance.However,　the　fault　dip　angle　has　little　effect　on　the　tunnel　response.　©　2022,　The　Editorial　Board　of　Journal　of　Basic　Science　and　Engineering.　All　right　reserved.