NOVELTY - Preparation of titanium oxide thin film electrode material involves mixing styrene in deionized water, adding sodium bicarbonate solution, methacrylic acid, and potassium sulfate solution, obtaining monodisperse polystyrene nanospheres, cleaning fluorine-doped tin oxide conductive glass, placing in aqueous suspension of polystyrene nanospheres, obtaining uniform polystyrene nanospheres colloid crystal template, impregnating template in sol-gel, obtaining composite film, coating titanium dioxide layer on composite film, and obtaining titanium dioxide film electrode material.    USE - Preparation of titanium oxide thin film electrode material used for dye-sensitized solar cell.    DETAILED DESCRIPTION - Preparation of titanium oxide thin film electrode material involves mixing styrene in deionized water, in volume ratio of 1:3-1:20, under nitrogen gas protection, adding sodium bicarbonate solution (0.015-0.035 g/mL) and methacrylic acid, uniformly mixing at 70-80 degrees C, adding potassium sulfate solution (0.1-11%) as initiator, reacting at 80-95 degrees C for 0.5-5 hour, and again reacting for 0.5-2 hour, centrifuging, drying, obtaining monodisperse polystyrene nanospheres having grain diameter of 120-1000 nm and standard deviation of less than 1%, and ultrasonic cleaning fluorine-doped tin oxide conductive glass using acetone and ethanol, vertically placing the conductive glass into aqueous suspension of polystyrene nanospheres, drying under air atmosphere, obtaining uniform polystyrene nanospheres colloid crystal template, and stirring surface active agent of polyoxyethylene-polyoxypropylenepolyoxyethylene, absolute ethyl alcohol, titanium tetrachloride and tetra-butyl ester, mixing, obtaining precursor sol, and heat treating, impregnating polystyrene nanospheres colloid crystal template in sol-gel, obtaining composite film, drying, and mixing nano titanium dioxide sizing agent, polyvinyl alcohol, de-ionized water, absolute ethyl alcohol, and then, coating titanium dioxide layer on the composite film, heat treating, and obtaining double layers of titanium dioxide film electrode material. The volume ratio of styrene, sodium bicarbonate solution and methacrylic acid is 1:1:(0.06-0.1).