In　order　to　determine　the　optimal　construction　method　for　loess　tunnels　with　super-large　cross-section,　considering　the　elastoplastic　constitutive　relation　between　tunnel　lining　and　soil　and　using　FEM　software　ANSYS,　a　case　of　loess　tunnel　with　super-large　cross-section　is　calculated　by　means　of　six　kinds　of　methods,　which　are　CD　method,　CRD　method,　single-wall　excavation　method,　double-wall　excavation　method,　pre-excavation　core　soil　method　and　pre-retaining　core　soil　method.　By　comparing　the　displacement　results　of　control　nodes,　the　results　show　that,　for　the　loess　tunnel　with　super-large　cross-section,　the　CRD　method　is　the　optimal　one.　When　temporary　support　is　added　in　construction,　the　central　temporary　support　has　great　influence　on　the　stability　of　surrounding　rock,　and　equivalent　plastic　strain　is　increased　by　about　20%　before　and　after　demolition　of　the　temporary　support.