To　analyze　the　carbon　emission　reduction　effect　of　the　sponge　city　construction　model　at　Beijing　Daxing　International　Airport,　the　carbon　sources　and　sinks　of　sponge　facilities　under　rainfall　conditions　in　extra　dry　year,　partial　dry　year,　normal　year,　partial　wet　year,　and　extra　wet　year　were　calculated,　and　the　pathways　and　effects　of　carbon　emission　reduction　were　analyzed.　The　results　show　that　compared　with　the　traditional　construction　mode,　the　carbon　emission　reduction　of　the　sponge　city　construction　model　at　Beijing　Daxing　International　Airport　for　the　whole　year　is　795.　6　~　1　804.　0　t　of　carbon　dioxide　emission　equivalent,　with　an　average　annual　reduction　of　1221.　2　t.　In　different　hydrological　characteristics　years,　the　carbon　emission　reduction　rate　of　Daxing　International　Airport　is　47.　5%　~　58.　7%,　and　the　carbon　dioxide　emission　equivalents　of　the　sponge　city　construction　model　are　reduced　relative　to　airports　of　the　traditional　construction　mode　by　an　average　of　an　annual　reduction　of54.9%.Thecarbon　dioxide　emission　equivalent　increases　with　the　increase　of　rainfall　in　a　certain　range,　and　the　more　precipitation,　the　greater　the　absolute　reduction　of　carbon　emission　reduction　of　the　sponge　city　construction　model.　©　2023,　Editorial　Board　of　Water　Resources　Protection.　All　rights　reserved.