Abstract: TiO₂ powder was prepared by hydrolysis and electrolysis respectively by using TiCl₄ as precursor,and was characterized by X-ray power diffraction.The influence of preparation method,calcination temperature and preparation condition on crystal phase of TiO₂ was investigated.The experimental results show that calcination temperature is an important factor which influences the crystal phase of TiO₂ prepared by hydrolysis,but doesn't influence the crystal phase of TiO₂ prepared by electrolysis.Furthermore,the size of TiO₂ powder prepared by electrolysis is influenced by dry method,the size of TiO₂ powder lyophilized is smaller than that of high-temperature calcined one.