Abstract: The present invention relates to a packaging material feeding device on a packaging machine with two winders. This system includes two driving servomotors 4, 34, winders 1, 31, a driving mechanism 24, 25 of the packaging material in the form of a strip, two coding devices 54, 56, and sensing devices 55, 57 which sense a signal corresponding to the instantaneous diameter of the activated packaging material reel and, in response thereto, supply a control signal for controlling the driving speed of these winders. The system also includes a press 17, 21 to automatically match the end of the strip of packaging material on the reel being unrolled to the beginning of the strip on the following reel.