The invention discloses an end plate for carbon-dioxide arc welding surfacing. The end plate comprises an annular end plate blank with a notch. The end plate blank is placed on a welding working tabletop. The notch is filled with a weld joint formed by carbon-dioxide arc welding surfacing. When carbon-dioxide arc welding is adopted, splashing of welding slag is less, no air hole or impurity or pseudo welding is likely to be generated, welding efficiency is high, and the weld joint and the inner wall of the notch are firmly welded.