Abstract: Amorphous TiO₂ nanotube was prepared on titanium sheet by anodization and its surface morphology is characterized by SEM. The water contact angle on TiO₂ nanotube is gauged by JGW-360 A contact angle measuring instrument and the factor on hydrophilicity of nanotube is studied including illumination time,tube diameter,tube length and so on. The results show that amorphous TiO₂ nanotube irradiated at 25 W possess excellent hydrophilicity,tube diameter has little influence on hydrophilic property,the longer the carbon nanotubes,the better the hydrophilicy.