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Abstract: Morphology, crystal structure, magnetic and microwave absorption properties of BaTiO3-based ferromagnetic/ferroelectric composites were investigated in this research. It was evident that Niph name="sbnd" />P/BaTiO3 composite was a narrowband absorber, whereas carbonyl iron/BaTiO3 composite samples showed broadband absorption characteristics. For the carbonyl iron/BaTiO3 composite, a reflection loss exceeding −20dB was obtained in the frequency range of 3.8–5.8GHz with an absorber thickness of 2.3–3.3mm. An optimal RL of −46dB was found at 4.7GHz for an absorber thickness of 2.8mm. The effective absorption bandwidth with RL<−10dB was extended and reached 16GHz (2–18GHz). Moreover, the intrinsic reasons for microwave absorption of the composites, the dielectric loss and magnetic loss mechanics were also investigated. [Copyright &y& Elsevier]