The graphene/BaFe12O19/CoFe2O4 nanocomposite powders were successfully synthesized by a deoxidation technique. The phase composition, morphology and electromagnetic properties of the nanocomposites were characterized by various instruments. The as-prepared graphene/BaFe12O19/CoFe2O4 nanocomposite exhibits a saturated magnetization of 50.42 emu/g. The electromagnetic parameters of graphene/BaFe12O19/CoFe2O4 nanocomposite were investigated in the 2-18 GHz range. The graphene/BaFe12O19/CoFe2O4 nanocomposite exhibits better microwave absorbing properties than BaFe12O19/CoFe2O4 nanocomposite. The excellent microwave absorbing property is achieved and the minimum reflection loss of the nanocomposite can reach -32.4 dB, which is obviously enhanced compared with that of the BaFe12O19/CoFe2O4 nanocomposite. (C) 2015 Elsevier B.V. All rights reserved.