Ion-doped mesoporous TiO2 thin films with regular mesoporous structure ware successfully prepared through the sol-gel method and spin-coating. The Zn2+,Fe3+-doped TiO2 thin films exhibit mesoporous structure with pore size of 7-9 nm,and the Y3+-doped TiO2 thin films exhibit mesoporous structure with larger pore size of 10.9 nm,which characterized by small angle X-ray diffraction patterns and TEM photographs. Optical properties were studied through the thin film transmission spectra of three kind of metal-doped mesoporous TiO2 thin films,and the refractive index of the films were fitted by Swanepoel envelope method. It can be found that after doping with Fe3+,optical absorption edge of mesoporous TiO2 thin-films was obviously broadened;and Y3+ dopants protects the collapse of mesoporous structure from the excessive growth of TiO2 nanocrystalline,offering a help to obtain mesoporous thin-films with large pore size.