Method for improving welding seam uniformity of magnetic control rotating electric arc welding

The invention relates to a method for improving the uniformity of a magnetic control rotating electric arc welding seam. The method comprises the following steps: respectively turning a first annular bulge and a second annular bulge on the to-be-welded end surfaces of a first pipe fitting and a second pipe fitting; the first pipe fitting and the second pipe fitting are installed on the two clamps; annular electromagnetic blocks are respectively mounted on the first pipe fitting and the second pipe fitting; the first pipe fitting and the second pipe fitting are connected to the positive electrode and the negative electrode of a welding power source through electric wires correspondingly. The two clamps are slowly away from each other; and after the ends of the first pipe fitting and the second pipe fitting are heated and melted by the electric arc, the two clamps are close to each other, so that the ends of the first pipe fitting and the second pipe fitting are extruded, the electric arc is extinguished, and w