The TiO2 materials have excellent performances in the photocatalytic field, due to their high photocatalytic efficiency, good stability, not easy to produce secondary pollution, low cost, etc, and have been widely used in the fields of antibacterial and anticancer, preparation of hydrogen, wastewater treatment, solar cells, and self-contained solar cells, cleaning and anti-fogging, and so on. In this paper, the research progress of TiO2 photocatalytic materials in recent years are reviewed, and the photocatalytic mechanism over TiO2 catalysts and influencing factors of activity for TiO2 photocatalysts are also discussed. Then, the modification methods for TiO2 photocatalysts are systematically reviewed. The problems of TiO2 photocatalytic materials are also analyzed and the future development is prospected.