This　paper　analysed　the　surface　deformation　caused　by　shield　construction　parameters,　which　refer　to　the　background　of　a　shield　tunnel　construction　of　Beijing　subway　10th　line.　The　results　show　that　increase　rock　deformation　modulus　can　reduce　surface　subsidence　and　differential　settlement,　when　the　rock　stress　release　rate　is　smaller,　and　the　surface　subsidence　and　differential　settlement　is　smaller.　When　shield　positive　soil　pressure　is　greater　it　causes　Uplift　in　front　of　soil　and　reduce　final　settlement,　but　it　increases　the　differential　settlement　in　the　course　of　construction,　when　the　equivalent　circle　zone　deformation　modulus　is　larger　or　smaller,　the　settlement　is　small.　Through　parameters　optimization,　it　makes　the　influence　on　the　ground　surface　and　structures　deformation　to　the　minimum.