The invention discloses a production process for ultra-high-purity lead oxide. The process comprises the following steps: under the electrolytic parameters are that the current density is 100-200A/m<2>, the voltage is 0.3-0.5V, the electrolyte temperature is less than 40 DEG C, and the electrolyte circulation amount is less than 15L/min, and under the condition that an additive composed of surfactants such as an aromatic compound and a lignosulfonate is added into an electrolyte, re-purification is performed on electrolytic lead, the obtained lead ingot is subjected to particle casting, ball milling is performed to form powder, the powder enters an electrical heating lead powder oxidizing roaster, oxidization is performed for 3-7h, after inspection is performed by using acetic acid to findthat no lead metal exists, a material can be discharged, and the material is conveyed to a crushing system by using a conveyor with a cooling water jacket. According to the process provided by the invention, the ultra-high-purity lead oxide product of which the Ag content is lower than 100ppb and the Au content is lower than 1ppb can be stably produced.