Abstract: Ultraviolet germicidal lamp has excellent sterilization and disinfection effect.However, the core component of high-power ultraviolet germicidal lamps-the filament waste rate is high, which can affect the production capacity and delivery time.The annealing process of filament production was studied by Plato analysis of the waste rate of ultraviolet sterilizing filament, and better setting process parameters were obtained.The results show that, the filament breaking phenomenon can be effectively improved by heating the wet hydrogen annealing process up to 1100 ℃and winding speed of 4.5 m·s^-1.Adding acetone soaking to remove oil stain before high temperature setting can avoid the brittle phenomenon of tungsten wire produced by carburizing during annealing.The high temperature setting process(1400 ℃, heating for 15 min, holding for 15 min)is optimized to control the screw length of filament body.The waste rate of filament reduceds from 40%to less than 10%.