In　large-span　tunneling　projects,　the　mechanical　behavior　of　the　rock　changes　in　response　to　different　sequential　excavation　methods　(　SEMs)　of　advancing　the　tunnel　face.　The　double　side　drift　method　(　DSDM),　which　is　a　development　of　SEM,　was　widely　used　in　loess　tunnels　with　large　cross　sections　in　China　for　its　ability　to　limit　ground　displacement.　This　paper　presents　the　deformation　characteristics　of　large-span　loess　tunnels　of　the　high-speed　railway　line　in　China.　Field　monitoring　and　numerical　simulations　were　conducted　to　determine　the　optimal　construction　approach　and　reveal　the　deformation　properties　of　large-span　loess　tunnels　in　China.　The　construction　approaches,　support　measures,　ground　surface,　and　subsurface　deformation　characteristics　associated　with　DSDM　are　demonstrated.　The　ground　surrounding　the　loess　tunnel　underwent　vertical　settlement　at　the　arch　part　and　at　the　ground　surface　because　of　the　metastable　structure　of　the　loess.　This　study　provides　an　in-depth　illustration　of　the　influence　of　face-advancing　sequences　on　ground　displacement　induced　by　tunneling,　which　helps　us　implement　the　most　effective　SEMs.