Catalytic　combustion　is　a　promising　way　to　remove　trace　amounts　of　CH4　to　alleviate　serious　environmental　concerns.　However,　the　reactivity　of　a　catalyst　at　low　temperature　is　usually　limited　because　of　the　difficulty　to　activate　the　C-H　bond　of　methane.　Herein,　we　design　a　Pd(PdO)/Co3O4@SiO2　bimetallic　oxide　core-shell　catalyst　which　shows　much　higher　activity　in　the　methane　combustion　reaction　compared　with　Pd(PdO)/SiO2　and　Co3O4@SiO2　catalysts　without　a　core-shell　structure.　The　T-50%　and　T-90%　of　Pd(PdO)/Co3O4@SiO2　are　357　degrees　C　and　445　degrees　C,　respectively,　which　decrease　by　67　degrees　C　and　55　degrees　C　in　comparison　with　those　of　Pd(PdO)/SiO2.　Extensive　characterization　demonstrates　that　the　bimetallic　oxide　core-shell　structure　can　effectively　enhance　the　metal　interaction　between　Pd　and　Co,　which　can　weaken　the　strength　of　the　Co-O　bond　in　Pd(PdO)/Co3O4@SiO2.　The　weakening　of　the　Co-O　bond　could　promote　the　release　of　more　lattice　oxygen　species　to　participate　in　the　C-H　breaking,　resulting　in　superior　catalytic　performance　in　methane　combustion　at　low　temperature.