Abstract: One-dimensional TiO₂,for its large surface area and high aspect ratio,not only can play fully photocatalytic role of TiO₂ in the industrial wastewater treatment,but also is easy to be separated,so the research on it has significant value.In this paper,the optimum condition to obtain TiO₂ nanorods is determined.Then the phase and morphology of TiO₂ are characterized by means of XRD、SEM、FT-IR、TGA-DSC.TiO₂ appears in a form of nonarod,and belongs to anatase.Use of UV degradation of methyl orange is employed to examine the effect of photocatalytic activity of the TiO₂ nanorods.The results show that compared with the degradation rate of sol-gel TiO₂ powder the degradation rate of TiO₂ nanorods increased about 10%.