A magnetic ROV umbilical cord cable The first magnetic umbilical cord cable is structured as follows: comprises three first cables in a central position, one side of the first cable is provided with afirst single-mode optical fiber, three first cables and an outer part of the first single-mode optical fiber are wrapped with silicon steel sheets, a coil is wound on the silicon steel sheets, two ends of the coil are respectively connected with a positive electrode and a negative electrode, and the outer wrapping of the silicon steel sheets is provided with a first buoyancy material; The gap ofthe three first cables is filled with a first filling material; The second magnetic umbilical cord cable is structured as follows: comprises a second single-mode optical fiber in a central position, the exterior of the second single-mode optical fiber is provided with three second cables arranged in a triangular staggered arrangement, The second cable and the second single-mode optical fiber are wrapped with a second buoyancy material, the second buoyancy material is filled with a second filling material at a gap at an inner position of the second buoyancy material, the outer portion of the second buoyancy material is wrapped with a carbon steel ring, and the outer portion of the carbon steel ring comprises a third buoyancy material. Work reliably.