NOVELTY - Preparing photonic crystal structural film electrode for dye solar battery, where it takes three-dimensional ordered anatase titanium dioxide holes arranged in the form of inverse opal structure, comprises: (a) sealing de-ionized water to a round-bottom flask; (b) washing and filtrating the colloidal micro-balls; (c) dissolving tetrabutyl titanate in anhydrous ethanol; (d) sintering the film rough bass to prepare negative temperature titanium dioxide film; (e) soaking the negative temperature titanium dioxide film to the dye solution to carry out sensitization.    USE - The method is useful for preparing photonic crystal structural film electrode for dye solar battery.    ADVANTAGE - The method improves electrode structure of traditional dye battery, surpasses limitation of photo-fabrication in laboratory and improves application potential. The photonic crystal structural film electrode expands specific surface area combined with dye, so it has higher short-circuited current and filling factor.    DETAILED DESCRIPTION - Preparing photonic crystal structural film electrode for dye solar battery, where the photonic crystal structural film electrode takes three-dimensional ordered anatase titanium dioxide holes arranged in form of inverse opal structure, in which the diameter of the film material is 50-500 nm and the thickness is 0.5-40 microns, comprises: (a) sealing de-ionized water to a round-bottom flask and uniformly mixing micro-ball preparation agent and surfactant in presence of nitrogen, injecting the mixture to the round-bottom flask, then injecting an initiator to carry out soap-free emulsion polymerization, after reaction, naturally cooling the mixture to room temperature so as to prepare colloidal micro-balls; (b) washing and filtrating the colloidal micro-balls, diluting them as single dispersant colloidal micro-ball solution, then injecting the single dispersant colloidal micro-ball solution to a container, in which a fluorine doped tin oxide glass is vertically arranged, that is, fluorine-doped tin dioxide conductive glass sheet substrate, carrying out dry growth process to prepare photonic crystal positive template; (c) dissolving tetrabutyl titanate in anhydrous ethanol, gradually dropping diethylamine under high-velocity stirring and taking the mixture as polymerization inhibitor, preparing precursor glue solution drops, then covering a clear glass sheet on the photonic crystal positive template, adding the precursor glue solution drops at slot between the clear glass sheet and fluorine doped tin oxide glass sheet substrate to prepare film rough base; (d) sintering the film rough bass to prepare negative temperature titanium dioxide film to be applied to dye solar battery electrode; (e) soaking the negative temperature titanium dioxide film to the dye solution to carry out sensitization, then orderly covering one layer of double faced adhesive tape and coupled electrodes on the photonic crystal titanium dioxide film, fixing them and using a dropping tube to penetrate electrolyte and preparing the photonic crystal structural film electrode for dye solar battery.