NOVELTY - Production of a hollow carbon sphere comprises dissolving 100-700 mu L polymer and 6-40 mu L oleic acid in 10-50 mL deionized water, adding 5-30 mg potassium persulfate, heating to 70-90 degrees C, reacting for 2-10 hours, separating, and drying to obtain template polymer microspheres A; dispersing in deionized water, adding a solution of dissolved carbon, carrying out hydrothermal polymerization, centrifuging, washing, and drying to obtain composite microsphere; and heating the composite microsphere at 1-20 degrees C/minutes to 1000 degrees C, maintaining for 2 hours, and naturally cooling.    USE - Method for the production of a hollow carbon sphere used in preparing an electrode for dye-sensitized solar energy battery (claimed).    ADVANTAGE - The hollow carbon sphere increases catalytic effect and catalytic property of the electrode. The method is inexpensive.    DETAILED DESCRIPTION - Production of a hollow carbon sphere comprises:    (A) dissolving 100-700 mu L polymer and 6-40 mu L oleic acid in 10-50 mL deionized water, stirring at 10-50 degrees C, adding 5-30 mg potassium persulfate, heating to 70-90 degrees C, reacting for 2-10 hours, separating, and drying to obtain template polymer microspheres A;    (B) dispersing the template polymer microspheres A in deionized water, adding a solution of dissolved carbon, stirring, transferring the solution in an autoclave, carrying out hydrothermal polymerization, high-speed centrifuging, washing, and drying to obtain composite microsphere; and    (C) under nitrogen environment, heating the composite microsphere at 1-20 degrees C/minutes to 1000 degrees C, maintaining for 2 hours, and naturally cooling.    An INDEPENDENT CLAIM is included for preparing an electrode for dye-sensitized solar energy battery, comprising:    (A) ultrasonically dispersing the hollow carbon sphere in a solvent, e.g. isopropyl alcohol for 5-60 minutes to prepare 0.1-10 mass% slurry;    (B) uniformly coating the slurry on a conductive substrate, under nitrogen atmosphere, and sintering at 80-800 degrees C for 5-60 minutes; and    (C) assembling in a dye-sensitized solar energy battery.