Abstract: Nanocrystalline TiO₂ solution was prepared by hydro-thermal treatment at 230℃ with Titanium（Ⅳ） isopropoxide（C₁₂O₃8O₄Ti） as precursor solution.Anatase TiO₂ nanocrystalline films with hierarchical structure were prepared on FTO glass substrates by electrohydrodynamic（EHD） technique and sintered at 450℃.Nanocrystalline Ag₂S/TiO₂ heterostructure films were deposited by chemical bath method using the AgNO₃ solution and Na₂S solution as the reactants.The crystal structure,morphology and optical property of the film were investigated.The photoelectrochemical cells have been assembled with nanocrystalline Ag₂S/TiO₂ heterostructure films as the photoanode.The results indicate that nanocrystalline TiO₂ films stack with the submicron spherical clusters,submicron and nanometer channels with wide dimension formed among the clusters which can facilitate the solution facilitation and ions adsorption.Ag₂S nanocrystalline exist in the Ag₂S/TiO₂ heterostructure Films within the range of 3 to 5nm.UV-vis absorbance spectra verifies the quantum confinement effects of Ag₂S nanocrystalline.The photoelectrochemical measurement shows the film possesses photoelectric response characteristic and its photoelectric property decays as illumination time prolonging.