PURPOSE: To make the sectional area of the drawn wire uniform, by constituting the wire drawing system as follows; plural stages of wire drawing mechanisms including a discharge-rate variable hydraulic pump, a stationary hydraulic motor, and a capstan, are installed; the discharge rate of the hydraulic pump of the final wire drawing mechanism is controlled by its input signal; and the discharge rate of hydraulic pumps of another wire drawing mechanisms is arithmetically operated and controlled by the input signal and the correction signal of the dancer roller.

CONSTITUTION: Coupled discharge-rate variable hydraulic pumps 5, 6, 7, and the stationary hydraulic motors 8, 9, 10, and the capstans 17, 18, 19, for giving a tension to the blank wire 4 and for passing it through the dies 14, 15, 16, are provided in the wire drawing mechanisms 1, 2, 3, which are installed between the blank wire feeding mechanism 200 and the coiler 201 in plural stages; the discharge rate of the hydraulic pump 7 of the final stage wire drawing mechanism 3 is controlled by the preset input signal; the discharge rate of hydraulic pumps 5, 6, of another wire drawing mechanisms 1, 2, is arithmetically operated and is controlled by above stated input signal and the correction signal produced correspondingly to the position of the dancer roller 22 installed in the capstans 17, 18, of the wire drawing mechanisms other than that of the final stage so as to be freely detachable from the capstan.