This　paper　discusses　focused　on　the　structure　deformation　caused　by　a　large　cross　shield　tunnel　traversing　down　a　subway　station.　The　diameter　of　the　shield　tunnel　is　11m.　Three-dimensional　finite-difference　program　is　used　for　simulation　of　large　diameter　shield　tunnel.　The　numerical　simulation　scheme　is　based　on　a　soil-structure　model,　in　which　the　plastic　model　is　used　in　calculation　to　describe　the　soil　behavior　and　the　link　element　is　used　to　simulate　the　deformation　joint　of　the　station　structure.　The　constitutive　relationship　and　the　parameters　of　the　link　element　is　defined　in　a　specific　way.　It　is　found　that　the　structure　becomes　flexible　with　deformation　joint　considered　in　model,　and　the　prediction　of　deformation　is　more　reasonable　to　conduct　risk　evaluation　of　station　structure.