Nano TiO2 is synthesized by using sodium hydrate and titanic chloride as materials in the solvent of ethylene glycol in this paper.The structure of particles is studied by FT-IR、XRD、TEM. It was proved that the surface of the mid-particle was wraped with organic substance and became nano TiO2 after calcined at 500 ℃. It was proved to have photocatalytic property by degradating phenol.