Extensive　agricultural　irrigation　in　the　loess　region　of　Northwest　China　has　seriously　damaged　the　local　hydrogeological　environment.　To　properly　understand　the　hydrological　processes　and　the　hydraulic　properties　of　the　layered　soil,　the　field　soil　column　irrigation　test,　laboratory　soil　column　infiltration　test,　and　undisturbed　soil　sample　hydraulic　experiments　were　carried　out.　The　results　showed　that　the　proposed　infiltration　model　can　continuously　simulate　the　infiltration　process　of　the　loess-palaeosol　sequence　well.　The　layered　structure　may　form　a　temporary　groundwater　table　at　the　interface　of　the　two　different　soils　under　irrigation　conditions.　This　provides　a　scientific　basis　for　proposing　reasonable　irrigation　measures.