Sodium titanate(Na2Ti3O7) crystal fibers were synthesized by hydrothermal method using TiO2 and NaOH as raw materials. Then using Na2Ti3O7 and Bi(NO3)3·5H2O as raw materials,NaOH as mineralizer,Na0.5Bi0.5TiO3 powders was prepared successfully with two step hydrothermal.The phase composition and particle morphology of the as prepared powders were characterized by X ray diffraction (XRD) and scanning electron microscopy(SEM).Analysis results indicated that the uniformity spherical agglomerates of Na0.5Bi0.5TiO3 were successfully prepared by two step hydrothermal.