Base　on　the　shaft　construction　of　a　subway　station　in　Changchun,　make　a　detailed　analysis　of　the　field　monitoring　data　of　the　retaining　structure　and　the　ground　surface　settlement　against　the　excavation　process　of　the　inverted　side　wall　shaft.　By　using　the　FLAC-3D　software　of　finite　difference,　the　numerical　simulation　are　conducted,　thus,　make　a　comparison　with　the　site　monitoring　data,　and　summarize　the　deformation　characteristics　of　the　retaining　structure　and　the　surface　deformation　of　the　inverted　side　wall　shaft　during　the　excavation.　Results　show　that　the　support　of　the　inverted　side　wall　shaft　which　adopting　alternation　excavation　and　supporting　while　excavating　has　good　stability,　and　the　monitoring　result　is　close　to　the　numerical　simulation＇s,　which　provides　the　basis　for　the　success　of　the　engineering.　The　research　results　can　be　references　for　other　similar　designs　and　constructions.