NOVELTY - A photoelectric solar energy battery three-dimensional silver oxide electrode preparing method involves selecting titanium and washing with water. The washed titanium is soaked, rinsed, etched and washed. Silver nitrate is dissolved in deionized water. Block polyether surfactant is added to solution. The obtained titanium substrate is soaked in silver ammonia complex ion solution. The titanium substrate and silver ammonia complex ion solution are moved in vessel, and put in oven. The titanium substrate is removed and washed with deionized water, and dried.    USE - Method for preparing photoelectric solar energy battery three-dimensional silver oxide electrode.    ADVANTAGE - The method enables preparing photoelectric solar energy battery three-dimensional silver oxide electrode with stable open circuit voltage and high photoelectric conversion efficiency.    DETAILED DESCRIPTION - A photoelectric solar energy battery three-dimensional silver oxide electrode preparing method involves selecting purity of 99.5% and thickness of 0.1-1 mm titanium and washing with water and metallographic sandpaper. The washed titanium is put in 40 mass% sodium hydroxide solution to soak for 30 minutes, rinsed with deionized water, put in mixed solution of sulfuric acid and nitric acid with volume ratio of 1:1, etched at 60 degrees C for 1 hour, washed with deionized water, and again put in 15 mass% oxalic acid solution for 2 hours to form gray pitted surface of titanium substrate. Silver nitrate is dissolved in deionized water to obtain solution with concentration of 0.25-5 mole/l. 1-10 mass% Block polyether surfactant is added to solution and vigorously stirred while 5-15 mass%, 25% aqueous ammonia is dropped to form three-dimensional self-assembly capability silver ammonia complex ion solution. The obtained titanium substrate is soaked in silver ammonia complex ion solution. 20% Sodium hydroxide is added to solution to adjust the pH to 8.5. The titanium substrate and silver ammonia complex ion solution as a whole are moved into polytetrafluoroethylene autogenous pressure vessel lined vinyl fluoride, and put in oven at 120 degrees C for 8 hours. The titanium substrate is removed and repeatedly washed with deionized water attached to the surface of uneven silver oxide particles and impurities, and naturally dried at 120 degrees C for 3 hours to obtain three-dimensional silver oxide electrodes.