NOVELTY - Titanium dioxide solution and ethyl cellulose solution are mixed. Terpineol and n-butanol are added and reacted, and ethanol is distilled off. The obtained colloid is ground to obtain a slurry. The slurry is printed on glass to obtain a titanium dioxide nanocrystalline thin film and dried to generate a crack mark. Carbon nanotubes are added to aluminum nitrate solution to obtain a suspension. Electrophoretic deposition is carried out using suspension, thin film as cathode, and molybdenum anode to obtain a carbon-nanotube-doped titanium dioxide composite.    USE - Surface-cracking preparation of carbon-nanotube-doped titanium dioxide composite for dye-sensitized solar cells.    ADVANTAGE - The method enables simple, easy and quick surface-cracking industrial mass-production of carbon-nanotube-doped titanium dioxide composites with low energy consumption. The obtained composite improves efficiency of dye-sensitized solar cells.    DETAILED DESCRIPTION - Conductive glass is ultrasonically washed with ethanol, acetone, or deionized water, and naturally dried. Titanium dioxide P25 powder and ethyl cellulose are separately added to anhydrous ethanol, such that mass fraction of titanium dioxide is 30-45% and mass fraction of ethyl cellulose is 10-20% in the ethanol solution. Both solutions are mixed in a volume ratio of 1:1 to obtain a mixed solution. Terpineol and n-butanol are added to the mixed solution such that the mass ratio is (1.5-2):1 and (1-2):1, respectively, and stirred. The contents are reacted in a water bath at 80-90 degrees C and ethanol is distilled off. The obtained colloid is ground to obtain a slurry of titanium dioxide. The conductive glass is fixed on a screen printer and the slurry is printed on the glass to a thickness of 1.5-2.5 mu m to obtain a titanium dioxide nanocrystalline thin film. The film is dried at 80-150 degrees C to generate a crack mark. Aluminum nitrate nonahydrate is added to absolute ethanol to obtain a solution with a concentration of 4x 10-3-5x 10-3 mol/L. Carbon nanotubes are added to the solution to obtain a carbon nanotube suspension with a solid content of 0.04-0.05%. Electrophoretic deposition is carried out using the obtained suspension, the nanocrystalline thin film as cathode, and molybdenum anode at 15 V for 10-60 seconds to obtain a carbon-nanotube-doped titanium dioxide composite.