Based　on　the　calculation　diagram　specified　by　the　current　codes,　the　horizontal　slice　principle　and　the　horizontal　seismic　coefficient　are　introduced　to　establish　a　general　method　for　calculating　the　ground　loading　of　shallow　tunnels　under　seismic　scenario.　Compared　with　the　traditional　methods,　it　can　unify　the　static　and　seismic　scenarios　into　one　single　calculation　diagram,　separate　two　strength　parameters　apart　as　independent　factors,　and　consider　the　multiple-layered　ground　condition.　The　case　study　of　simple　ground　shows　that　the　separation　of　cohesion　and　friction　angle　can　describe　the　ground　loading　in　a　more　accurate　way.　The　case　study　of　multi-layered　ground　shows　that　the　ground　condition　within　the　range　of　tunnel　itself　plays　a　key　role　for　the　distribution　of　ground　loading.　Moreover,　the　influences　of　two　strength　parameters　and　horizontal　seismic　coefficient　on　the　rupture　angle　and　vertical　ground　loading　are　further　analyzed　through　a　series　of　case　studies.　The　proposed　method　provides　a　reliable　theoretical　basis　and　technical　reference　for　the　anti-seismic　analysis　of　shallow　tunnels.　©　2020,　Editorial　Office　of　Chinese　Journal　of　Geotechnical　Engineering.　All　right　reserved.