The utility model relates to a shape-following conduction welding device which comprises a magnetic vehicle, a universal supporting arm and fixed clamps, wherein one end of the universal supporting arm is arranged on the magnetic vehicle by the fixed clamp; the lower end of the universal supporting arm is connected with a welding gun by the fixed clamp; the magnetic vehicle is a shape-following magnetic vehicle; the magnetic vehicle is also provided with a speed regulation knob; the magnetic vehicle is provided with four permanent magnetic wheels; the magnetic vehicle has a moving speed of 50 to 750mm/min; the fixed clamp connected between the universal supporting arm and the welding gun comprises a universal supporting arm hole, a connecting bolt hole and bolt holes; the connecting bolt hole for installing an embedded bolt is positioned between the universal supporting arm hole and the bolt holes and is used for implementing rotation regulation of the universal supporting arm; the bolt holes are used for fixing the universal supporting arm and the welding gun by installed bolts. The shape-following conduction welding device disclosed by the utility model has a compact structure; the deposition modeling quality and deposition speed of cold welding can be greatly improved; the shape-following conduction welding device can be popularized and used in a large range. The utility model provides the shape-following conduction welding device which is ingeniously designed, has excellent performance and is convenient and practical.