The invention discloses a method for improving the photoelectric conversion of a large-scale dye-sensitized solar cell. The method comprises the following steps: printing a layer of conductive paste on the conducting glass by a screen printing method; then, coating a layer of glass paste on the surface of the conductive glass; and forming a compact protective film after sintering so as to improve the electric conductivity of the surface of the conductive glass and protect the glass from corrosion of strong oxidative substances in electrolyte. The method has simple process and low cost, particularly solves the problem that the photoelectric conversion of all-solid-state dye-sensitized solar cell is restricted by the electric conductivity of the conducting glass, and is an effective method for improving the photoelectric conversion and stability of the all-solid-state dye-sensitized solar cell.