To　investigate　the　longitudinal　mechanical　response　of　a　pipeline　or　tunnel　under　reverse　fault　dislocation,　this　paper　introduces　the　two-parameter　Pasternak　model　and　the　vertical　displacement　profile　equation.　The　analytical　solution　for　the　longitudinal　mechanical　response　of　the　pipe　or　tunnel　under　reverse　fault　dislocation　is　obtained　by　solving　the　differential　equation.　The　corresponding　numerical　simulations　and　model　tests　have　been　carried　out,　and　the　analytical　solutions　have　been　verified　by　combining　the　numerical　simulation　results　and　model　test　data.　A　parametric　analysis　is　presented　in　which　the　effects　of　the　shear　stiffness　of　the　elastic　layer,　the　coefficient　of　subgrade　reaction,　the　dip　angle,　and　the　ratio　of　soil　thickness　to　tunnel　diameter　are　investigated.　The　results　show　that　as　the　shear　stiffness　of　the　elastic　layer　G　increases,　the　difference　between　the　bending　moment　and　the　shear　force　of　the　tunnel　near　the　fault　trace　becomes　smaller,　and　the　value　of　the　maximum　displacement　increases.　As　the　coefficient　of　subgrade　reaction　k　increases,　the　maximum　deformation　location　of　the　tunnel　is　closer　to　the　fault　trace,　the　difference　between　the　bending　moment　and　the　shear　force　of　the　tunnel　is　greater,　and　the　active　length　decreases.　The　displacement,　bending　moment　and　shear　force　distributions　of　the　tunnel　become　closer　to　the　footwall　as　the　dip　angle　alpha　increases.　The　increases　in　the　ratio　of　soil　thickness　to　tunnel　diameter　H-2/D　lead　to　the　distance　of　the　maximum　displacement　position　from　the　fault　trace,　the　difference　between　the　bending　moment　and　the　shear　force　decreases,　but　the　active　length　increases.