N-doped TiO2 porous material was prepared by sol-gel method.The obtained photocatalysts are found to be of anatase phase,nitrogen is incorporated into the framework of TiO2 by XRD and SEM.The degradation rate of N-TiO2 porous materials to methyl orange is 81.7% under UV radiation in 2.5h,appropriate aeration can increase degradation rate effectively.