Large pipe fitting welding platform

The utility model relates to a large pipe fitting welding platform, which belongs to the technical field of pipe fitting processing, and adopts the technical scheme that the large pipe fitting weldingplatform comprises a horizontally arranged workbench, a submerged arc welding machine is connected to the upper surface of the workbench in a sliding manner along the length direction of the workbench, and an accommodating groove is formed in the upper surface of the workbench; the length direction of the containing groove is parallel to the length direction of the workbench, the two ends in thecontaining groove are each provided with a supporting frame, the upper surface of each supporting frame is provided with two clamping plates tending to move in the direction close to each other, and asupporting plate moving in the vertical direction is arranged in the containing groove. The upper surface of the supporting plate is rotationally connected with a plurality of poking rollers, the axis direction of each poking