Bimetallic　Pd-Ce/γ-Al2O3　series　catalysts　were　prepared　by　impregnation　method　in　our　experiment.　Effects　of　the　catalysts　performance　on　the　low　concentration　methane　catalytic　combustion　were　investigated.　Structures　and　chemical　properties　of　the　catalysts　were　characterized　and　analyzed　by　scanning　electron　microscopy　(SEM),　N2　adsorption/desorption　isotherms　and　H2-temperature　programmed　reduction　(H2-TPR).　Effects　of　different　calcination　temperature　and　additive　dosage　on　catalytic　activities　were　studied;　the　catalytic　activity　of　the　recycling　catalysts　was　investigated　at　the　same　time.The　results　showed　that　the　optimal　calcination　temperature　was　550,　the　highest　efficiency　difference　of　about　40%　at　the　same　catalytic　temperature.　Compared　with　the　single　metal　catalyst,　bimetallic　catalyst　was　benefit　to　improve　the　catalytic　activity,　but　the　catalytic　effect　was　not　obvious.　However,　the　catalytic　activity　could　be　improved　significantly　when　being　used　for　many　times,　compared　with　the　first　experiment,　the　catalytic　efficiency　of　the　highest　difference　of　about　50%.　The　probably　reason　were　that　the　synergistic　effects　between　PdO　and　CeO2　could　be　strengthen,　the　dispersion　of　the　PdO　could　be　improved,　and　the　desorption　energy　of　the　adsorption　oxygen　could　be　reduced,　all　of　which　enhanced　the　catalyst　activity.　©　2017,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.