National　and　local　governments　implement　municipal　solid　waste　classification　policies　to　reduce　waste　disposal　and　minimize　environmental　pollution.　Beijing　started　implementing　its　classification　of　municipal　solid　waste　policy　in　May　2020.　This　study　evaluates　the　impact　of　Beijing＇s　household　waste　classification　policy　on　carbon　emissions　during　collection,　transportation,　and　treatment.　The　policy＇s　introduction　reduced　the　number　of　trash　bins,　influenced　transportation　modes,　and　altered　waste　treatment　emissions.　We　found　a　notable　reduction　in　average　net　carbon　emissions　post-policy　implementation　(2403　kg　CO2eq　per　metric　ton　of　waste)　compared　with　pre-policy　(3584　kg　CO2eq　per　metric　ton　of　waste).　If　Beijing　reaches　its　2025　waste　target,　these　emissions　will　decrease　further　to　1760　kg　CO2eq　per　metric　ton　of　waste.　Translating　these　findings　into　monetary　terms　confirms　this　policy＇s　environmental　and　economic　efficacy.