To　achieve　classified　protection　requirements　of　important　information　system　and　study　high-level　security　operating　system　required　in　GB　17859,　this　paper　focus　on　the　structured　protection　of　the　security　operating　system　for　high-level,　based　on　the　accumulation　of　existing　security　operating　system,　first　with　the　current　security　features　of　the　operating　system　architecture,　research　a　new　operating　system　security　architecture　based　on　micro-kernel　and　a　security　pipe　model　which　built　trusted　interaction　channels　between　entities　in　operating　system,　formed　the　theoretical　basis　and　scientific　support　to　the　classified　protection　for　important　information　system　and　the　project　for　high-level　security　operating　system.