The invention discloses a high-insulation electrode which comprises an insulation layer, a first metal layer and a second metal layer. The insulation layer is made of glass fiber; the first metal layer is made of copper powders; and the second metal layer is made of iron powders. The first metal layer is attached on the insulation layer in a high-temperature spraying manner; and the second metal layer is attached on the first metal layer in a high-temperature spraying manner. Through the method above, the high-insulation electrode can enable the insulating performance of a capacitor to be improved greatly while charging and discharging of the capacitor are realized.