Straightening device for petroleum drill pipe machining

The utility model relates to the technical field of oil drill pipe production, and discloses a straightening device for oil drill pipe machining. The straightening device for oil drill pipe machiningcomprises two oppositely-arranged stand columns, two clamping pieces, a base and a stretching device. The stretching device is contained in the base and comprises a speed reduction motor and two setsof oppositely-arranged transmission assemblies, and a second bevel gear is fixed to an output shaft of the speed reduction motor. Each transmission assembly comprises two fixing plates which are parallel to each other. According to the straightening device for oil drill pipe machining, when the oil drill pipe is straightened, overall linkage of the straightening device can be achieved only by controlling the operation mode of the gear motor, the overall structure is simplified, the production cost is reduced, and meanwhile the two sets of transmission assemblies in the base are symmetrically arranged, so that the strai