NOVELTY - A sulfur-bridged linkage molecule bonding quantum-dot titanium dioxide nano-composite photo-anode preparation method involves adding acetic acid, deionized water and ethanol into a beaker to form mixture. The mixture is dispersed in titanium dioxide powder. Terpilenol and ethanol solution are added to the mixture. Glass is printed on the mixture to prepare an anode. Potassium borohydride and selenium powder are placed in a container to obtain precursor solution. The solution is mixed with molecule precursor solution to form final solution. The anode and final solution are placed in a kettle.    USE - Method for preparing a sulfur-bridged linkage molecule bonding quantum-dot titanium dioxide nano-composite photo-anode for a solar battery.    ADVANTAGE - The method enables improving repeatability and quantum dot coverage of the photodiode, evenly distributing quantum dots, and improving photo-electric conversion performance of the battery.    DETAILED DESCRIPTION - A sulfur-bridged linkage molecule bonding quantum-dot titanium dioxide nano-composite photo-anode preparation method involves placing titanium dioxide powder p25 into a mortar. 0.25 ml of acetic acid, 1.25 ml of deionized water and 7.5 ml of ethanol are added into a beaker to form mixture. The mixture is ultrasonically and uniformly dispersed in the powder. 5 g of terpilenol and 7.5 g ethyl cellulose ethanol solution with mass concentration of 10% are added to the mixture. The beaker is placed in a magnetic force stirrer at 90 degrees C after pure water in the mixture is vaporized. Fluorine doped tin oxide glass is screen printed on the mixture to prepare a porous titanium dioxide light anode. 6 mol of potassium borohydride is placed in a sealed container. De-ionized water is added to the container to dissolve the potassium borohydride. 2 mol of black selenium powder is added to the container. The container is sealed with a rubber plug of a slurry pump piston. The plug is formed with a pinhole exhaust system. The selenium powder is made to disappear at room temperature under magnetic force stirring reaction to obtain ionic selenium precursor solution. 2 mol of water solubility inorganic cadmium salt is completely dissolved in 30 ml of de-ionized water. Bridging group molecule is added to the water and stirred by magnetic force, where ratio of the salt and the molecule is 1:2-4. Sodium hydroxide solution is utilized to adjust pH value of the water to 9-13. The water is mixed with argon gas to obtain cadmium-bridge molecule precursor solution. The selenium precursor solution is mixed with the molecule precursor solution and acutely stirred under protection of argon gas to form orange yellow quantum dot precursor solution, where ratio of the salt, the selenium precursor solution and the molecule precursor solution is 1: 0.025-0.6 :2-4. The anode is placed in a polyfluortetraethylene lining stainless steel high pressure reaction kettle. The dot precursor solution is transferred into the kettle, where filling degree of the solution is 70-80%, and reaction temperature of the kettle is 100-180 degrees C. The kettle is heated for 1-20 hours to obtain sulfur-bridged linkage molecule bonding quantum-dot titanium dioxide nano-composite photo-anode. The photo-anode is formed with aluminum titanium oxide pattern in a furnace at 450-500 degrees C for 30-60 minutes.