Tunnels　crossing　inactive　faults　may　suffer　from　severe　damage　during　earthquakes.　Fault　sites　have　a　significant　hanging　wall　effect　during　earthquakes,　but　this　effect　on　the　tunnel　seismic　response　has　not　been　specifically　quantified.　In　this　study,　shaking　table　tests　were　conducted　to　investigate　the　fault　site　effect　and　seismic　response　of　fault-crossing　tunnels.　The　hanging　wall　effect　is　the　results　of　the　geometric　effect　due　to　the　asymmetric　distribution　of　inclined　fault.　This　geometric　effect　will　lead　to　the　reflection　of　seismic　waves　between　the　ground　surface　and　fault　interface　and　exacerbating　the　acceleration　of　the　hanging　wall.　The　acceleration　of　the　tunnel　located　in　the　hanging　wall　is　significantly　greater　than　that　located　in　the　footwall,　which　is　not　only　attributed　to　the　dynamic　characteristic　of　the　site,　but　also　the　interaction　between　the　dynamic　characteristics　of　different　areas　of　the　site.　For　the　tunnel　sections　located　in　the　hanging　wall,　the　influence　range　of　the　fault　is　approximately　twice　the　tunnel　diameter,　for　those　located　in　the　footwall,　the　fault　has　limited　effect.　©　2023　The　Author(s).