The　special　driving　environment　of　highway　extra-long　tunnels　causes　high　operational　risks　and　difficult　escape.　The　establishment　of　a　sound　emergency　escape　support　system　is　essential　for　drivers　to　escape　safely　in　risky　accidents.　Based　on　the　factors　such　as　the　type　and　severity　of　tunnel　operation　risks,　this　paper　studies　and　puts　forward　the　level　of　extra-long　tunnel　operation　risk　management　and　the　requirements　for　safe　emergency　escape　of　relevant　personnel　under　different　levels,　and　establishes　and　improves　the　composition　of　the　extra-long　tunnel　emergency　support　system　and　the　function,　location　and　spacing　of　each　facility　in　the　subsystems.　Considering　the　condition　of　extra-long　tunnels,　the　research　conclusions　provide　a　scientific　basis　for　emergency　escape　management　and　establishment　technology,　and　proposes　a　safer　support　system　for　emergency　escapes.　©　2021　IOP　Conference　Series:　Earth　and　Environmental　Science.