50　sets　of　surface　methane　flux　tests　were　conducted　to　test　and　analyze　the　methane　oxidation　capacity　of　the　soil　cover　at　different　landfilling　ages　by　using　static　chamber,　laser　methane　detector　and　other　equipment.　In　addition,　a　modified　calculating　method　was　proposed　to　directly　evaluate　the　methane　oxidation　rate　and　methane　oxidation　fraction　of　the　soil　cover.　The　field　test　and　analysis　results　indicated　that　the　surface　methane　flux　at　80%　of　the　test　sites　were　lower　than　the　CFI　(Carbon　Farming　Initiative)　standard　of　60g/(m2·d);　there　were　emission　hotspots　with　methane　flux　exceeding　CFI　limit　within　20m　near　the　gas　guide　shaft.　The　surface　methane　flux　of　the　landfill　decreased　from　1.13g/(m2·d)　to　0.53g/(m2·d)　during　the　landfilling　ages　from　3　to　7　years,　and　remained　basically　stable　during　the　period　of　7　to　10　years.　There　was　a　positive　correlation　between　methane　oxidation　rate　and　methane　flux　at　the　bottom　of　the　cover.　The　maximum　methane　oxidation　rate　measured　in　the　soil　cover　was　63.30g/(m2·d),　and　the　corresponding　methane　flux　at　the　bottom　was　75.95g/(m2·d).　The　average　methane　oxidation　fraction　of　the　upper　loess　cover　at　each　landfilling　age　was　over　90%.　©　2023　Chinese　Society　for　Environmental　Sciences.　All　rights　reserved.