The invention belongs to the technical field of multi-head wire drawing production and particularly relates to an inductive automatic wire-replacing system for a multi-head wire drawing machine. The inductive automatic wire-replacing system comprises pay-off baskets and a movable pay-off assembly, the movable pay-off assembly comprises a horizontal guide rail fixed to a pay-off bracket, and the guiding direction of the horizontal guide rail is parallel to the arranging direction of the two sets of pay-off baskets below the horizontal guide rail; a movable lifting arm is placed on the horizontal guide rail, wherein the movable lifting arm and the horizontal guide rail constitute sliding block and guide rail fit, and a direct-changing wheel used for changing the traveling direction of wire bodies at the pay-off baskets is arranged on the movable lifting arm; and the inductive automatic wire-replacing system further comprises a driving part used for pushing the movable lifting arm to enable the movable lifting arm to slide relative to the horizontal guide rail, and an annular contact-type sensor fixed to a wire body traveling path between the direction changing wheel and the pay-off baskets. According to the inductive automatic wire-replacing system, the knotting wire-breaking situation caused by the fact that material moving is not in time can be effectively avoided, the wire-replacing efficiency of wire drawing operation is greatly improved, and the line body breaking phenomenon can be lowered accordingly.