The invention relates to a processing technology of ultra-white glass white printing oven outer door glass in the technical field of glass product manufacturing. The ultra-white glass with a transmittance of more than 95% is selected and cut according to the design size of the oven outer door glass by using a full-automatic glass cutting machine to obtain an oven outer door glass substrate; the edges of the oven outer door glass substrate are edged by using a glass edger; after washing and drying with a washing machine, three layers of ultra-white ink are printed on a decorative area of the oven outer door glass substrate in three times through a screen printer; each layer of ultra-white ink is heated and cured after printing, and then placed in a horizontal continuous tempering furnace toheat and temper, so that the ultra-white ink is sintered with the oven outer door glass substrate into a whole; and after the oven outer door glass is naturally cooled, the oven outer door glass is rinsed with pure water, dried, and then packed and stored. According to the invention, the ultra-white ink can be sintered with the oven outer door glass substrate into a whole at a high temperature; therefore, the ultra-white ink is not easy to fall off, the durability is good, and the texture is better, so that the product is more beautiful and high-grade.