The utility model discloses a mouth orthotic devices is pouted to transversal joint submerged arc welding steel pipe relates to the welding seam and corrects technical field. Including the lift cantilever, the steel pipe rollgang, go up the mould, the bed die, the hydro -cylinder, one end of the support rack is hinged at the support, a machine support, support tile and lift, frame lower extreme fixed connection is in ground, upward mould is connected to the frame upper end, frame one side is equipped with the lift cantilever, the lift is connected to lift cantilever one end, lift fixed connection is in ground, the lift cantilever other end is fixed with the support frame, the mould below is located to the support frame, the hydro -cylinder is fixed on the support frame top, the bed die is connected at the hydro -cylinder top, support frame lower extreme joint support tile. The mouth can be pouted by off -line correction steel pipe to this device, reduces economic loss, does not influence production line production efficiency.