In　the　face　of　the　anti-globalization　trend　and　the　shrinking　of　the　global　value　chain,　ensuring　the　safety　of　the　global　layout　of　the　industrial　chain　and　the　sustainability　of　each　country＇s　internal　intermediate　product　production　cycle　has　become　an　important　new　development　strategy　for　all　countries.　The　sustainability　of　the　internal　and　external　cycles　of　production　systems　is　closely　related　to　global　value　chains.　Based　on　the　world　input-output　model,　we　define　the　trade　pattern　of　intermediate　goods　in　various　countries　from　the　perspective　of　trade　intermediary　attributes,　and　propose　two　indicators　by　which　to　measure　the　dependence　of　China　on　the　global　value　chain　in　the　process　of　＂dual　circulation＂　development:　the　degree　of　vertical　specialization　(VSD)　and　the　import　share　of　domestic　total　consumption　(IMS);　China＇s　super-large　market　leads　to　low　values　of　both　VSD　and　IMS.　China＇s　high-tech　industry　has　the　highest　degree　of　external　dependence　in　the　process　of　participating　in　dual　circulation,　and　there　has　been　a　fluctuation　cycle　since　2009.　The　external　dependence　of　different　industries　shows　heterogeneity.