Eu，Sm-codoped TiO2 nanocrystals were synthesized by the sol-gel method, and the down-conversion photoanode were prepared with the matrix of P25 doped with the as-prepared Eu，Sm-codoped TiO2 powders, which was introduced into the dye-sensitized solar cell. The photoelectric properties were enhanced due to the down-conversion feature of Eu，Sm-codoped TiO2. The luminescent properties of powders were characterized by the fluorescence spectroscopy. Fluorescence spectroscopy results indicate that the Eu，Sm-codoped TiO2 powders possess down-conversion feature of converting ultraviolet light to 550~700 nm visible light exposed to 463nm ultraviolet light. The short circuit current density of the dye-sensitized solar cell with a photoanode doped with 1 mol% Eu3+ and 0.5 mol% Sm3+ reaches to 14.08 mA/cm2, which is 32.08% higher than that with Eu3+ doped TiO2 photoanode, and the efficiency is also reached to 5.29 %.