Thoriated tungsten electrode contains 0.8%-4.2% thorium oxide, and its electron work function is 2.7eV. It can be widely used in various TIG and PAW for its easy and stable arcing. Thorium oxide has strong current-carrying capacity, high recrystallization temperature, better conductivity, stronger mechanical cutting performance and longer service life. When welding, the tip of thoriated tungsten electrode keeps sharpening so that the ball on the tip of tungsten electrode can be not easy to crack at a greater degree of assurance.