rutile tio2 nanowire array films with multi-walled carbon nanotube (mwcnt) inclusion perpendicularly grown on fluorine-doped tin oxide (fto) substrate were prepared by a facile hydrothermal method. the absorption edges of the tio2 nanowire array films are blue-shifted with increasing mwcnt content. the resistance of the tio2 nanowire array film is decreased by mwcnt inclusion. the optimum tio2/mwcnt molar ratio in the feedstock is 1:0.1. for the tio2 nanowire array film with mwcnt inclusion served as electrode in dye-sensitized solar cell (dssc), an overall 194% increase of photoelectric conversion efficiency has been achieved.