NOVELTY - Forming silicon dioxide/titanium dioxide composite photo-anode of dye-sensitized solar cell involves mixing tetrabutyl titanate with water then adding acetic acid and nitric acid, and sealing to form colloid; hydrothermally reacting colloid in kettle, then adding tetrabutyl titanate and de-ionized water and again subjecting into kettle and reacting to form colloid; adding 2-(2-(4-(2,4,4-trimethylpentan-2-yl)phenoxy)ethoxy)ethanol into isopropyl alcohol and reacting with colloid; and coating colloid by conductive glass, calcining and immersing in dye solution to form photo-anode.    USE - For the preparation of silicon dioxide/titanium dioxide composite photo-anode substrate containing dye-sensitized solar cell which is used as power generating device (claimed).    ADVANTAGE - The present method produces silicon dioxide/titanium dioxide composite photo-anode dye sensitized solar cell which is a battery with open-circuit voltage, and high short circuit current, and having high photo-electric conversion efficiency; and is simple, easy, and cost-effective.    DETAILED DESCRIPTION - Preparation of a silicon dioxide/titanium dioxide composite photo-anode of dye-sensitized solar cell involves: (a1) mixing tetrabutyl titanate with water at a vol. ratio of 8-12:100, stirring at room temperature, filtering and washing; (b1) adding acetic acid and nitric acid at vol. ratio of 5-15:0.5-1 to the product of step (a1), at 60-80 degrees C under stirring, adding water till the total volume and acetic acid volume ratio of 150-200:10, sealing and stirring to a blue transparent colloid; (c1) transferring the obtained colloid to hydrothermal reaction kettle, and reacting at 200 degrees C for 12-24 hours, and finally removing the upper layer clear liquid in the reaction kettle to obtain white colloid; (d1) adding white colloid with tetrabutyl titanate which is gas-phase nanocrystalline titanium dioxide of 1-10% to P25 tetrabutyl titanate and having 0.5-9% of nano silicon dioxide, adding de-ionized water till the total volume in the step (b1) is equal to the total volume, fully and uniformly stirring, and subjecting to ultrasonication; (e1) then again putting it into the reaction kettle, and hydro-thermally reacting at 200 degrees C for 8-12 hours to obtain colloid; (f1) adding 2-(2-(4-(2,4,4-trimethylpentan-2-yl)phenoxy)ethoxy)ethanol (OP) as emulsifying agent into isopropyl alcohol to prepare the OP emulsifying agent solution; (g1) reacting the colloid obtained in the step (e1) with tetrabutyl titanate at wt. ratio of 0.5-1% of polyethylene glycol and then adding the OP emulsifying agent solution, continuously condensing to obtain colloid, where the volume ratio of the OP emulsifying agent solution and the tetrabutyl titanate is 1-3:10; (h1) coating the colloid of the step (g1) using conductive glass with a film thickness of not less than 5 to 15 mu m, calcining at high temperature, to form a silicon dioxide/titanium dioxide composite film; (i1) immersing the silicon dioxide/titanium dioxide compound thin film into 0.2-0.5 mM dye solution to obtain a dye-sensitized silicon dioxide/titanium dioxide composite photo-anode; and (j1) combining the obtained dye sensitized silica/titanium dioxide composite photo-anode and the platinum counter electrode into an I-/I3- electrolyte solution of a dye-sensitized solar cell.