Energy　supply　policy　quality　is　an　important　factor　that　would　impact　national　energy　security.　While　existing　research　conducted　policy　evaluation　from　the　lens　of　performance　assessment,　less　study　has　been　devoted　to　evaluating　energy　supply　policy　from　the　perspective　of　policy　making.　This　study　takes　the　energy　supply　policy　documents　issued　by　China＇s　central　government　during　the　‘13th　Five-Year　Plan’　period　(2016–2020)　as　the　research　sample,　and　pioneers　the　use　of　the　extended　policy　modelling　consistency　(PMC)　index　model　combined　with　the　text　mining　methodology　to　construct　a　policy　evaluation　index　system　with　the　characteristics　of　the　energy　supply　policy　which　conducts　a　more　in-depth　quantitative　evaluation　of　the　energy　supply　policy　documents.　The　results　show　that　the　average　PMC　index　value　of　China＇s　energy　supply　policies　is　7.26,　and　the　overall　quality　is　high.　The　concerns　of　existing　policies　are　mainly　focused　on　reform　and　development　planning,　safety　production　management　and　project　engineering　construction,　but　there　is　still　room　for　improvement　in　policy　predictability,　coordination　of　policy　areas,　clarity　of　policy　basis　and　goals　and　comprehensiveness　of　policy　tool　combinations.　Based　on　this,　China　should　improve　the　comprehensiveness　of　its　energy　supply　policy　tool　combinations　in　terms　of　policy　design　norm;　strengthen　policy　predictability　and　coordination　of　policy　areas　in　terms　of　policy　implementation　guarantee;　and　clarify　the　basis　and　goals　of　policies　in　terms　of　policy　orientation　enhancement,　to　provide　a　reference　basis　for　the　formulation　and　improvement　of　future　energy　supply　policies　and　to　realise　the　sustainable　development　of　energy　supply.　©　2023　The　Authors.　Energy　Science　&　Engineering　published　by　the　Society　of　Chemical　Industry　and　John　Wiley　&　Sons　Ltd.