The　surrounding　environment　and　the　site　of　the　construction　of　the　South　Square　Transportation　Hub　Center　of　Changchun　Railway　Station　are　complex,　the　excavation　area　is　large,　the　shape　is　irregular,　and　the　form　of　foundation　pit　is　complex.　In　order　to　better　verify　the　applicability　of　the　cut-top　down　method　to　the　project　compared　with　the　cut-cover　method,　and　its　advantages　in　environmental　protection　and　deformation　control,　now　it　is　constructed　under　the　same　control　condition　using　the　cut-cover　method　and　the　cut-cover　method.　Through　FLAC3D　simulation　of　the　construction　process　under　the　two-work　methods,　the　deformation　of　the　surface　around　the　foundation　pit　and　the　deformation　of　the　structure　itself　are　explored　separately,　and　a　more　advantageous　method　is　compared　and　analyzed.　Analysis　results　show　that　in　the　two　aspects　of　surrounding　environmental　protection　and　underground　structure　deformation　control,　the　original　project　adopts　the　cover　and　cut-top　down　method　is　better　than　that　of　the　cut-cover　method.　©　2020,　Editorial　Office　of　Journal　of　Liaoning　Technical　University.　All　right　reserved.