The invention discloses a cabling machine pre-twist broken wire detecting device, which comprises a base and a cabling machine arranged on the base, wherein the base is horizontally connected with a bracket, the upper surface of one end of the outer side of the bracket is provided with a fixing frame, one end side of the cabling machine is connected with a wire distribution shaft, the other end part of the wire distribution shaft is connected with a wire distribution disc, a moving disc device is fixed on the wire distribution shaft by means of nuts, the bottom part of the outer circumferential end surface of the moving disc device is connected with a ring, the ring is fixed on the fixing frame by means of a nut, a plurality of sets of broken wire prevention devices which are spaced at equal intervals in pairs are arranged on the moving disc device, a spring steel wire adjusting device is arranged between every two broken wire prevention devices, a spring steel wire is interconnected among the lower parts of the spring steel wire adjusting devices, and the spring steel wire passes through each of the spring steel wire adjusting devices. The cabling machine pre-twist broken wire detecting device is practical, can detect broken wires, automatically stops cabling, and ensures the cabling quality.