The invention relates to the technical field of cables, and particularly relates to a low-voltage fireproof cable which comprises a cable core, an insulating layer, a protective layer, a protective tube, two connecting blocks and a limiting tube. The limiting tube is fixedly connected with the opposite ends of the connecting blocks, a cutting knife is arranged between the limiting tube and the protective tube and is in a circular ring shape, and positioning holes are formed in the upper portion and the lower portion of the cutting knife. The free end of the limiting tube is fixedly connected with a guide pipe, a receding groove is formed in the end, close to the limiting pipe, of the guide pipe, two springs are arranged in the receding groove, one end of each spring is fixedly connected with the inner wall of the receding groove, two circular plates are arranged in the receding groove, and each circular plate is fixedly connected with the opposite end of the corresponding spring. The other end of each circular plate is fixedly connected with a positioning shaft, and one end of each positioning shaft penetrates through the corresponding limiting tube and is inserted into the corresponding positioning hole. A user can conveniently cut off a cable in time, and the situation that the cable is cut by a cutter is reduced.