For　long　underground　box　utility　tunnels,　post-tensioned　precast　concrete　is　often　used.　Between　precast　tunnel　segments,　sealed　waterproof　flexible　joints　are　often　specified.　Fault　displacement　can　lead　to　excessive　deformation　of　the　joints,　which　can　lead　to　reduction　in　waterproofing　due　to　diminished　contact　pressure　between　the　sealant　strip　and　the　tunnel　segment.　This　paper　authenticates　utilization　of　a　finite　element　model　for　a　prefabricated　tunnel　fault-crossing　founded　on　ABAQUS　software.　In　addition,　material　parameter　selection,　contact　setting　and　boundary　condition　are　reviewed.　Analyzed　under　normal　fault　action　are:　the　influence　of　fault　displacement;　buried　depth;　soil　friction　coefficient,　and　angle　of　crossing　at　the　fault　plane.　In　addition,　distribution　characteristics　of　the　utility　tunnel　structure　for　vertical　and　longitudinal/horizontal　relative　displacement　at　segmented　interface　for　the　top　and　bottom　slab　are　analyzed.　It　is　found　that　the　effect　of　increase　in　fault　displacement　on　the　splice　joint　deformation　is　significant,　whereas　the　effects　of　changes　in　burial　depth,　pipe-soil　friction　coefficient　and　fault-crossing　angle　on　the　overall　tunnel　and　joint　deformations　were　not　so　significant.