NOVELTY - A quantum point sensitized solar energy battery preparing method involves uniformly mixing ligand containing group of zinc ion, indium ion and silver ion, regulating the pH value, adding sodium hydrogen selenide solution. Titanium oxide film sheet preparation process is carried out. The quantum point sensitized solar energy battery preparing method is performed by immersing titanium dioxide film sheet in silver-zinc-indium selenide concentrated suspension quantum dots solution, followed by injecting electrolyte solution between photoanode and counter electrode.    USE - Method for preparing sensitized solar energy battery.    ADVANTAGE - The method enables preparing sensitized solar energy battery with increased quantum point absorbing effect, and without toxicity, in a simple, easy and cost-effective manner.    DETAILED DESCRIPTION - A quantum point sensitized solar energy battery preparing method involves uniformly mixing ligand containing group of zinc ion (Zn2+), indium ion (In3+) and silver ion (Ag+), regulating the pH value to 8-10, adding sodium hydrogen selenide solution under inert gas condition to obtain zinc ion- indium ion- silver ion selenium precursor solution and refluxing at 90-100 degrees C for 4-7 hours, where mole ratio of Zn2+, In3+, Ag+ and selenium ion (Se2-) is 2.8-3.1:0.8-1.1:0.1-0.12:0.8-1:6-10, and the total concentration of Zn2+ and In3+ is 0.01-0.02 mole/l. Titanium oxide film sheet preparation process is performed by cleaning and drying transparent conductive glass, adsorbing 20-40 nm titanium dioxide nanoparticles on the transparent conductive layer glass, where the re-adsorption layer of titanium dioxide particles have a diameter of 200-400 nm, sintering obtained film sheet at 400-500 degrees C for 20-30 minutes, scattering colored layer on the sheet; where the thickness ratio of the titanium dioxide nano-particle layer and the titanium dioxide particles layer are 1-2.5:1. The quantum point sensitized solar energy battery preparing method is performed by concentrating Ag:ZnInSe quantum dot solution to the original volume of 1/20-1/10, adding 3-10 mg polyethylene glycol octylphenyl ether surfactant to 1 ml Ag:ZnInSe concentrated suspension quantum dots solution, immersing titanium dioxide film sheet in silver-zinc-indium selenide concentrated suspension quantum dots solution for 20-30 hours, adsorbing quantum dot films on titanium dioxide to obtain a photoanode, followed by injecting electrolyte solution between the photoanode and counter electrode.