Abstract: The nanocrystals of ZnFe₂O₄ were prepared by stearic acid gel method.The sample was characterized by Fourier transform infrared spectrum（FT-IR）, X-ray diffraction（XRD）, scanning electron microscope（SEM） and energy spectrum analysis（EDS）.The results show that spinel zinc ferrite nanocrystals had average granular size and spherical surface topography and its grain size distributed between 10 and 36 nm.The advantages of this method were mixing uniformity, simplicity of operation, easy control of stoichiometry and low synthesized temperature.