Anti-deformation steel pipe inner wall surfacing welding machine

The invention relates to the field of surfacing welding machines, in particular to an anti-deformation steel pipe inner wall surfacing welding machine which comprises a base, two guide rails are symmetrically arranged on the two sides of the top end of the base, movable workbenches capable of transversely and mutually moving are symmetrically arranged at the two ends of the tops of the guide rails, and a stand column is vertically arranged in the center of the upper end face of each movable workbench. A welding arm assembly capable of longitudinally moving to adjust the height and transversely extending is arranged on one side of the stand column, an adjusting frame is arranged at one end of the welding arm assembly, a self-adaption device capable of elastically stretching out and drawing back is installed at one end of the adjusting frame, and a first fixing frame used for welding is arranged on one side of the bottom of the self-adaption device. According to the steel pipe rotary welding device, the self-ad