Anticorrosive coating compensating device of steel tube outside seams

The utility model discloses an anticorrosive coating compensating device of steel tube outside seams, and belongs to the field of steel tube surface external corrosive prevention. The anticorrosive coating compensating device comprises a frame; a steel tube rotary supporting roller is fixed on the frame; a press roller is arranged above the steel tube rotary supporting roller; a plastic extruder and a rubber extruder for supplying coating are arranged above the press roller; traction rollers supplying power are arranged among the plastic extruder, the rubber extruder and the press roller; and compensating devices are arranged between the traction rollers and the press roller. The anticorrosive coating compensating device reduces the thickness of the coating of a steel tube body through the alternating motion of upper rollers of the compensating devices, ensures that the coating thickness of a weld zone meets process requirements, and saves a large amount of production cost.