The adjustable welding rotator frame is adisplacement machine that drives the weldment to rotate by means of thefriction between the active welding rotator and the weldment. Only one weldingrotator part of the adjustable welding rotator frame is the driving weldingrotator part, and the other welding rotator part is the driven welding rotatorpart. The drive device of the adjustable welding rotator frame adopts thevariable frequency speed regulation motor, and the welding rotator part isdragged by the reducer, and the welding piece is driven for welding rotation.The distance adjustment of the welding rotator parts in each welding rotatorframe is realized by manually positioning the bolts according to the weldingconditions.