NOVELTY - Zinc acetate-ethanol solution is spin-coated on indium-tin-oxide conductive glass and heat-processed. The indium-tin-oxide conductive glass is annealed. A zinc oxide seed layer is inserted into growth solution and zinc oxide nanorod is grown. The cadmium sulfide quantum dot is deposited on zinc oxide nanorod. Methanol is added to dissolve potassium borohydride. Cadmium nitrate is dissolved in methanol, and layer of zinc oxide nanorods is grown, to obtain cadmium sulfide-cadmium selenide quantum dots segmented composite sensitized double-layer zinc oxide nanorod photoanode.    USE - Preparation of cadmium sulfide-cadmium selenide quantum dots segmented composite sensitized double-layer zinc oxide nanorod photoanode used for solar cell.    ADVANTAGE - The method provides solar cell having excellent photoelectric conversion efficiency.    DETAILED DESCRIPTION - Zinc acetate-ethanol solution is spin-coated on indium-tin-oxide conductive glass as a substrate and heat-processed at 300 degrees C for 20 minutes in a muffle furnace, and the spin-coating is repeated and heat treatment is carried out for 2 times. The indium-tin-oxide conductive glass is processed in furnace at 400 degrees C with temperature increase rate of 3 degrees C/minute, and annealed for 0.5-1 hour to obtain zinc oxide seed layer. A layer of zinc oxide nanorod is grown by preparing hexamethylenetetramine (0.025 mol/L) and zinc nitrate solution (0.0125 mol/L) under magnetic force stirring, slowly adding silicon nitrate solution to hexamethylenetetramine solution, dripping polyethylene imine (0.1 ml) with molecular weight of 600, dripping aqueous ammonia (0.7 ml) with mass concentration of 25-28%, and gradually adding nitric acid to adjust pH valve to 9.3. The zinc oxide seed layer is inserted into growth solution and zinc oxide nanorod is grown for 5-10 hours. The zinc oxide nanorod is provided to methanol solution of sodium sulfide (50 mmol/L) and cadmium sulfide (50 mmol/L) and processed to obtain cadmium sulfide quantum dot zinc oxide nanorod surface. The cadmium sulfide quantum dot is deposited on surface of zinc oxide nanorod and subjected to physical or chemical polishing. Methanol (40 mL) is added to dissolve potassium borohydride (0.27 g) and provided to sealed container, and argon gas is provided to container to remove oxygen to obtain clear transparent selenium-methanol solution at room temperature under magnetic force stirring and reacting. Cadmium nitrate (0.5 g) is dissolved in methanol (40 mL) at 87 degrees C in drying box, and layer of zinc oxide nanorods is grown, to obtain cadmium sulfide-cadmium selenide quantum dots segmented composite sensitized double-layer zinc oxide nanorod photoanode.