The invention belongs to the preparing field of TiO2 nano-crystal thin film photoelectrode of dye sensitization solar cell, especially relates to a preparing method of non-metal doped dye sensitization TiO2 nano-crystal thin film photoelectrode which is prepared by colloids containing non-metal doped large granule TiO2 nano-crystal and non-metal doped TiO2 nano-crystal granule. The photoelectrodeprepared by the invention is prepared by rotary coating the non-metal doped TiO2 colloidal sols and non-metal doped TiO2 power body slurry in order on a conductive substrate; after naturally drying, performing heat-treatment to obtain a nano-crystal thin film photoelectrode with porous structure. On one hand, the non-metal doped TiO2 nano-crystal granule changes the performance of the semiconductor, and is used as almsgiver to provide more carriers to improve the electric conductivity; on the other hand, the non-metal doped TiO2 nano-crystal granule changes the position of TiO2 energy band toimprove the photovoltage and the photo absorption efficiencies. The preparing method of the invention is simple and is easy to operate, is suitable for the industrial production preparation of the dyesensitization TiO2 nano-crystal thin film photoelectrode, and also is suitable for the fields of photochemical catalysis electrode and self-cleaning glass and so on.