To understand the principle of high frequency welding, it is necessary to have the necessary technical means to achieve it. High frequency welding equipment is used to achieve high frequency welding of electrical and mechanical systems, high frequency welding equipment is made of high frequency welding machine and welded pipe forming machine. The high frequency welding machine is composed of two parts, high frequency generator and feeding device, which is produced by high frequency current and control. The forming machine is composed of the extrusion roller frame, which is the part of the high frequency current melting, and the oxide layer and impurities are eliminated.