The utility model discloses a multifunctional vehicle-mounted cable deploying and retracting device, which comprises a bracket, a cable arranging wheel assembly, a cable coil assembly mechanism, a crank handle assembly and a brake mechanism, front supporting legs and rear supporting legs are arranged on two sides at the lower part of the bracket, wherein, positioning plates are arranged at the lower ends of the front supporting legs, walking wheels are mounted at the lower ends of the rear supporting legs, and the upper part of the bracket adopts an inverted U-shaped hand-push frame; the cable coil assembly is mounted on the bracket through a bearing, and the crank handle assembly is connected at one end of the cable coil assembly; the cable arranging wheel assembly is mounted on the bracket through the bearing, and a rotating shaft of the cable coil assembly is connected with a two-way lead screw of the cable arranging wheel assembly through a transmission mechanism. The utility model has the advantages of simple structure, convenient use, even cable arrangement, and high cable deploying and retracting efficiency. The cable deploying and retracting device is particularly suitable for the cable transmission under the conditions of random districts, short distance and various pathways, and has favorable economic benefit.