The Fe and La co doped nano TiO2 has been prepared by Sol Gel method. The sample was characterized by X ray diffractometer(XRD), X ray photoelectron spectroscopy (XPS), ultraviolet visible (UV Vis)spectrophotometer and fluorescence spectrophotometer (FL). The results show that all the samples present the anatase structure and the average size of the nano TiO2 is about 6.1 nm after calcining at 500 ℃,the doping restrained the increase of grain size, the doped Fe3+ and La3+ can enter into effectively the TiO2 crystal lattice and make the absorption profile of TiO2 red shift and increased the absorbance in visible light region. The less the fluorescence intensity of the sample was, the better the catalytic effect. The visible photocatalytic property of titania nanocrystalline grains was evaluated by the methyl orange decomposition. The results show that the optimized Fe and La co doped amount is approximately 0. 01%Fe/0. 6%La TiO2, The degradation rate is 40.7% after a light exposure for 5 h.