The main function of the copper-aluminum welding terminal is to connect copper wires and aluminum wires to achieve current transmission, while preventing oxidation and corrosion, and improving the stability and reliability of the connection. The copper-aluminum welding terminal connects copper and aluminum materials into one through welding. This connection method not only utilizes the excellent conductivity of copper and aluminum, but also reduces costs and reduces the weight of mechanical components. Since the surface of aluminum is very easy to oxidize, the oxide film formed is very strong and has a high resistance. Mechanical connection is unreliable, so welding methods are widely used in actual production to improve the comprehensive performance of copper and aluminum.