This　paper　first　establishes　a　Chinese　oil　risk　assessment　system　combining　traditional　and　complex　network　indicators　to　determine　the　evolutionary　trend　of　oil　supply　risk.　Then,　a　risk　analysis　system　for　China＇s　oil　import　source　countries　is　developed　to　determine　the　risk　level　of　China＇s　oil　import　source　countries　considering　four　factors:　resource,　political,　economic,　and　environmental.　In　addition,　the　robustness　of　the　China-dominated　oil　import　network　is　analyzed　using　a　cascading　failure　model.　The　results　show　that　China＇s　tight　centrality　tends　to　decrease,　trade　freedom　decreases,　and　oil　supply　risk　is　moderate　and　tends　to　increase　from　2016-2021.　Among　China＇s　major　oil　importers,　the　risk　is　low　for　import　source　countries　represented　by　Saudi　Arabia　and　Russia,　and　high　for　export　source　countries　represented　by　Angola　and　Oman.　After　random　and　deliberate　attacks　on　the　oil　import　network,　it　is　found　that　the　China-dominated　oil　import　network　is　more　robust,　with　countries　such　as　Angola　and　the　United　States　leading　to　network　cascade　failures　after　deliberating　attacks.　By　identifying　the　main　risk　countries　in　the　oil　import　network,　relevant　suggestions　are　made　to　optimize　the　oil　import　structure,　which　is　important　for　safeguarding　China＇s　oil　security.　©　2023　IEEE.