SBT ceramics were prepared from nano-sized powders obtained by hydrothermal method.The phase,particle size,morphology and dielectric properties were investigated by X-ray diffraction(XRD),scanning electron spectroscopy(SEM) and dielectric spectra,respectively.The results showed that the pure phase SBT ceramics with uniformly small grain and dense structure were successfully prepared by this method.The Curie temperature is 375℃ where the maximum dielectric constant is 114.54.