The adjustable welding roller frame can adjust the center distance of the rollers through the reserved screw hole or the lead screw to adapt of the change of the workpiece diameter. The drive adopts the cycloidal pinwheel reducer or worm gear reducer, and is driven by dual motors. According to the needs of users, the rollers are divided into three types: rubber wheels, steel wheels, and steel rubber combined wheels; they can be linked to other equipment for control. The roller frame is mainly used for welding, polishing, rubber lining and assembly of cylindrical cylinders, and can also be used with other tooling for assembly and welding of cones and segmented unequal diameter rotating bodies. This product is widely used in wind power, pressure vessel, petrochemical, pipeline, steel structure, boiler, shipbuilding, surfacing repair and other industries.