The NiZn(Ni0.4Zn0.6Fe2O4) spinel ferrite and Co2Z(Ba3Co2Fe24O41) hexagonal ferrite composite materials with the various Co2Z contents have been synthesized by the solid-state reaction method. The phases and microstructures of the sintered ceramics have been analyzed. The results show that Co2Z grains exist as a secondary phase in composites and remarkably affect the grain size and the static and high-frequency magnetic properties. With the addition ratio of Co2Z varying from 0 wt. % to 30 wt. %, the saturation magnetization only changes slightly and is closely related to the density of sintered composites. Meanwhile, the initial permeability decreases and the cut-off frequency expands from 7 MHz to 300 MHz. In addition, the product (μi - 1)fr of composites is much larger than that of the pure NiZn spinel ferrite.