In order to improve the microwave absorption properties,the compound particles of Ni-P coated barium ferrite were prepared by electroless plating.The structure,morphology,composition and microwave absorption properties of the Ni-P coated powders were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM),energy dispersive analysis of X-rays (EDS),and vector network analyzer.The results show that barium ferrite is successfully coated with Ni-P alloy and exhibits excellent microwave absorption properties.The maximum microwave absorption of the compound particles reaches-24.3 dB within 2-18 GHz.The bandwidth with the loss above-10 dB exceeds 2.8 GHz.