The work aims to improve the high temperature oxidation resistance and electrical conductivity of CuMn2O4 spinel coatings. Y modified CuMn2O4 spinel powder was prepared by sol-gel method. Y modified CuMn2O4 spinel coating was prepared on the surface of SUS430 alloy by screen printing. The phase structure and microstructure of Y modified CuMn2O4 spinel powder and coating were characterized by XRD and SEM. The high temperature oxidation behavior of CuMn2O4 spinel coating before and after Y modification in air at 800 ℃ for 168 h was studied by weight gain experiment. The area specific resistance of coating was measured by the “four-point method”. It was found that the lattice constant of CuMn2O4 spinel powder increased with the increasing of the content of rare earth Y. When the content of Y element was fixed at 0.02 mol/L, the increasing trend of lattice constant tended to be smooth and the modified CuMn2O4 spinel powder with stable structure, high crystallinity, fine grain size and less agglomeration could be obtained. The oxidation kinetics curves of CuMn2O4 spinel coating before and after Y modification followed the parabolic oxidation law, and the oxidation rate constants were 9.39×10-5 mg2/(cm4?h) and 6.31×10-5 mg2/(cm4?h), respectively. The area specific resistance of the Y modified CuMn2O4 spinel coating oxidized at 800 ℃ for 168 h was about 26.2 m??cm2, which was lower than that of unmodified coating (about 27.3 m??cm2). The Y modified CuMn2O4 spinel coating can effectively improve the high temperature oxidation resistance and electrical conductivity of metal interconnects.