Fixing device for welding automobile rear anti-collision beam

The invention discloses a fixing device for welding an automobile rear anti-collision beam. The fixing device comprises a rack, wherein the rack is provided with a vertical stroke guide rail and an actuating cylinder; a mounting plate fixing tool connected with the actuating cylinder is mounted on the stroke guide rail; the actuating cylinder acts to push the mounting plate fixing tool to move upand down along the stroke guide rail; an inverted energy absorption fixing tool corresponding to the mounting plate fixing tool is mounted on the rack; the mounting plate fixing tool comprises a plurality of support brackets and a plurality of fixing blocks connected with a rotating angle air cylinder; a mounting plate is lifted up through the support brackets; and under the action of the rotatingangle air cylinder, the fixing blocks rotate and press the mounting plate on the support brackets. A new clamping structure is designed, so that fixed installation of an energy absorption box and themounting plate is realized