Abstract: B_x:Bi-CVG ferrite samples were prepared by solid-state reaction.The effect of sintering additives of B₂O₃ on the bulk density,phase structure,microstructures and magnetic properties of Bi-CVG were investigated by means of XRD,SEM and MATS.The results showed that doping B can lower sintering temperature of Bi-CVG samples.B doping leads to an increase in density and has an influence on microstructures and magnetic properties of samples.With B dopant dose x=0.025 and as sintered at 1040℃ for 6h,the sample obtained has good integrated properties:with D=5.11g/cm³,D_R.T=97.2%,B_s=37.30mT,B_r=25.54mT,H_c=0.87kA/m in room temperature.