The　increase　in　e-commerce　and　online　shopping　has　resulted　in　a　significant　amount　of　packaging　waste　from　express　delivery,　posing　a　considerable　burden　on　the　environment.　To　address　this　issue,　reusable　express　packaging　has　emerged　as　one　of　potential　solutions　to　reduce　packaging　waste　in　express　delivery.　This　study　analyzes　the　evolutionary　stability　strategy　of　local　governments　and　express　delivery　enterprises　by　constructing　an　evolutionary　game　model.　The　model　considers　the　limited　rationality　and　group　behavior　of　decision　makers,　as　well　as　the　economies　of　scale　and　diseconomies　of　scale　in　operating　cost　of　reusable　express　packaging.　Results　indicate　that　the　variability　in　the　cost　of　reusable　express　packaging　may　lead　to　the　simultaneous　emergence　of　two　evolutionary　stability　strategies,　contrasting　traditional　evolutionary　game　studies.　Due　to　the　present　low　uptake　of　reusable　express　packaging　among　express　companies,　coupled　with　the　lack　of　subsidies　support　from　local　governments,　it　is　difficult　to　attain　the　optimal　situation　in　which　businesses　actively　utilize　reusable　express　packaging.　To　accomplish　this　objective,　it　is　crucial　to　establish　subsidy　amounts　that　are　balanced　and　reasonable,　rather　than　merely　elevating　them　to　the　highest　possible　levels.　The　study　proposes　an　optimal　range　for　government　subsidy　levels　and　gives　corresponding　policy　suggestions.　©　2024