Abstract: Titanium dioxide （TiO₂） photo-catalyst was prepared via hydrothermal route from industrial titanyl sulfate solution. The obtained samples were characterized by SEM,FT-IR,XPS,nitrogen absorption-desorption test and the photocatalytic properties of the photo-catalyst were also evaluated. The results indicate that the prepared TiO₂ possesses relatively higher photocatalytic activity,with an approximate photocatalytic degradation activity as P25 to methylene blue. With increase in temperature,the degradation rate in selective catalytic reaction for NO increases first and then gradually decreases,and the highest degradation rate of 84.14% can be obtained at 450 ℃. The particle size of the catalyst is 0.36~1.08μm,and its specific surface is 90.47 m²/g.