Sr2Ni0.4Co1.6O6 double perovskite oxide was prepared by sol-gel method, and thin layer graphene was pre-pared by modified Hummers reduction method. They were synthesized as catalysts for bifunctional cata-lysts, and used to test its oxygen catalytic performance. The analysis results (XRD, EDS, SEM, IR etc) in-dicate that Sr2Ni0.4Co1.6O6 is homogeneously dispersed on the surface of graphene layers. Electrochemical performance tests show that the maximum current densities of single Sr2Ni0.4Co1.6O6 and thin layer gra-phene oxygen reduction reaction (ORR) are 183.0 mA/cm2 and 151.6 mA/cm2 (-0.6 V vs Hg/HgO), respec-tively, and the maximum current densities of the oxygen evolution reaction (OER) are 267.7 mA/cm2 and 117.4 mA/cm2(1 V vs Hg/HgO). When the amount of thin layer graphene add is 10 % of the mass of the composite catalyst, the composite catalyst has the best oxygen catalytic performance, the maximum cur-rent density of ORR is 290.1 mA/cm2(-0.6 V vs Hg/HgO), and the maximum current density of OER is 390.5 mA/cm2(1 V vs Hg/HgO). It shows that the composite has excellent oxygen catalytic performance than the single catalyst.