Abstract: BiFeO₃ film was prepared on LaNiO₃ bottom electrodes by sol-gel process annealed at 500 ℃.Structure,dielectric,ferroelectric and leakage conduction properties at room temperature were studied.XRD study shows that the film adopts R3m structure and no impure phase was observed.The study of ferroelectricity shows that the film has large remanent polarization（Pr）,the Pr is 20 μC/cm² under an applied field of 700 kV/cm.The coercive field is 440 kV/cm.The study on dielectric property shows that film indicated small dielectric loss at the whole frequency range.While the study on leakage current characteristic indicates that the leakage current is reduced through the improvement of preparation tehchnology.