Abstract: NiFe2O4 spinel was synthesized via solid-state sintering technology using NiO and Fe2O3 as the raw materials, and ZrO2(f)/NiFe2O4 composites were prepared by adding ZrO2(f) fiber into NiFe2O4. The effects of molding pressure, sintering temperature and sintering time on the porosity and bending strength of ZrO2(f)/NiFe2O4 composites were investigated, and the composites were characterized by thermogravimetric analysis, X-ray diffraction and scanning electron microscopy. The results showed that the composites prepared under 160 MPa and sintered at 1300°C for 6 h possess low porosity and high bending strength, which are mainly composed of tetragonal ZrO2 and cubic NiFe2O4 spinel. There are no chemical reactions between ZrO2(f) and NiFe2O4, therefore, the excessively powerful interfacial binding strength is avoided.