Steel bar cold drawing device and using method thereof

The steel bar cold drawing device comprises a first cross beam, the first cross beam is fixedly connected with a second cross beam through a force transmission beam, the end, away from the force transmission beam, of the second cross beam is connected with a driving mechanism, and the driving mechanism is connected with a movable beam; the movable beam is connected with a connecting rod, one end of the connecting rod close to the first beam is connected with a transfer beam, the transfer beam is arranged between the first beam and the second beam, and two ends of the steel bar are respectively connected with the first beam and the transfer beam. The device is convenient to operate and small in occupied space, can control the cold drawing stress and the cold drawing rate at the same time, achieves graded cold drawing, can conduct cold drawing on a plurality of steel bars synchronously, and can effectively improve the tensioning efficiency and reduce the machining cost under the condition that the quality is gu