The invention relates to the technical field of welding equipment, in particular to a supporting device for welding, which includes a base, and support columns are installed on both sides of the upper part of the base, and the upper parts of the two support columns are provided with installation grooves, and the installation grooves The second gear is installed in both rotations, the upper part of the base is close to the fixed column installed between the two supporting columns, the rotating shaft is installed in the bearing, and the two ends of the rotating shaft are respectively connected with the two second gears. A fixed ring is installed between the supporting plates of the block, and a first gear is installed in the middle of the fixed ring, and the first gear meshes with the second gear. The slider is installed in the chute, and the fixed At least three object fixing devices are installed at both ends of the ring at equal distances in the circumferential direction. The invention is simple in structure, easy to use, can rotate materials, and can weld from multiple directions of materials, reducing the difficulty of welding and improving the quality of welding.