Welding set's welding carriage is restrainted to steel pipe with turning arm positioner, including the automobile body, the automobile body includes left automobile body and right automobile body, is equipped with left welding arm on the left automobile body, is equipped with right welding arm on the right automobile body, forms the steel pipe between left automobile body and the right automobile body and restraints the holding passageway, the right side of left automobile body is located the left registration roller that the holding passageway was restrainted to the steel pipe along fixedly connected with is vertical, the left border pin joint arm of turning right of right side automobile body is equipped with the vertical right registration roller that the holding passageway was restrainted to the steel pipe that is located on the arm of turning right, be equipped with horizontal thrust gear in the automobile body of the right side, the output of horizontal thrust gear is connected with the arm of turning right. The utility model discloses in the welding process that the steel pipe was restrainted, can press from both sides tight the support to steel pipe shu jinhang by left registration roller and right registration roller, make steel pipe shubuyi rock to further guarantee welding quality.