Lateral pressure fixing structure for high-temperature welding of to-be-welded part

The utility model is applicable to the technical field of welding, and provides a lateral pressure fixing structure for high-temperature welding of a to-be-welded part, which comprises a tray, an inner groove for placing a first to-be-welded part is processed on the tray, a slope is processed on the tray and positioned on the side wall of the inner groove, and a first gravity block is movably arranged on the slope. The first gravity block abuts against the first to-be-welded part so as to limit the first to-be-welded part, and a plurality of limiting parts used for limiting the second to-be-welded part are arranged on the tray. The second gravity block is arranged on the second to-be-welded part, the first to-be-welded part is placed in an inner groove of the tray, then the first gravity block is placed in the slope, the first gravity block rolls along the slope under the action of gravity until the first gravity block abuts against the first to-be-welded part to limit the first to-be-welded part, then the se