Welding pre-deformation control assembly

The utility model relates to the technical field of welding, and particularly discloses a welding pre-deformation control assembly which comprises a mounting plate, a jacking arm, a jacking piece, a connecting plate, a driving piece and a displacement sensor, the mounting plate is fixedly connected with the jacking arm, and the connecting plate is arranged above the mounting plate in parallel; the surfaces, facing each other, of the connecting plate and the mounting plate are provided with a first inclined face and a second inclined face respectively, the first inclined face is parallel to the second inclined face, the driving part is connected with one end of the connecting plate, the displacement sensor is used for detecting the horizontal moving distance of the connecting plate, and the jacking part can drive the jacking arm to move in the vertical direction. According to the welding pre-deformation control assembly, deformation compensation is applied in advance before the longitudinal bone of the thin pl