Pressure vessel correcting device

The utility model relates to the field of pressure vessel production equipment, in particular to a pressure vessel correcting device. Comprising two symmetrically-arranged clamping plates, grooves are formed in the clamping plates, the lower ends of the two clamping plates are fixedly connected through two connecting rods, the two connecting rods are symmetrically arranged front and back, the grooves are located between the two connecting rods, two vertical sliding grooves are formed in the opposite end faces of the two clamping plates, and the grooves are located between the two sliding grooves. A sliding plate is slidably arranged in any two opposite sliding grooves, a screw is in threaded connection with the sliding plate and penetrates through the sliding plate, a top plate is rotatably arranged at one end of the screw, a long groove is formed in the upper groove wall of the groove, a sliding block is slidably arranged in the long groove, a square rod is rotatably arranged at the lower end of the sliding