This invention discloses a method for producing grey-colored coated glass. The grey-colored coated glass comprises at least two layers: a glass plate and a film layer on the surface of the glass plate. The film layer comprises oxides of Co and Mn, and comprises at least one of ZnO, Al2O3, ZrO2, CuO, Fe2O3, Cr2O3 and MgO. The film layer is 40-80nm thick. The grey-colored coated glass has pure color, and can replace bulk-grey-colored glass. The method comprises on-line high-temperature pyrolysis spraying, which is realized during folating galss production process. The method utilizes the heat of the glass plate to pyrolyze, oxidize and deposite metal compounds in spraying solution onto the surface of glass plate to form the film layer. The method realizes continuous production, thus can increase production efficiency, lower the cost, and lower energy consumption. The light permeability of the grey-colored coated glass is 20-65%.