Vertical butt joint correcting device for large steel pipe column

The invention discloses a vertical butt joint correcting device for a large steel pipe column. The vertical butt joint correcting device comprises a steel pipe A, a steel pipe B, a base table, an adjusting device and a testing device, wherein the steel pipe A and the steel pipe B are stacked on the base table from top to bottom, the adjusting device comprises an adjusting screw rod, a lug plate Aand a lug plate B, a lug plate A is fixed to the outer wall of the steel pipe A, a lug plate B is fixed to the outer wall of the steel pipe B, one end of the adjusting screw rod is in threaded connection with a pair of adjusting nuts A, the other end of the adjusting screw rod is connected with a pair of adjusting nuts B in a threaded mode, the pair of adjusting nuts B are tightly clamped on the two sides of the lug plate B, and when the pair of adjusting nuts A are tightly clamped on the two sides of the lug plate A, the adjusting device enables the relative positions of the adjusting steel pipe A and the adjusting s