The invention relates to a power coiling and uncoiling device, in particular to a portable coiling and uncoiling device using power of a motor vehicle. The device comprises a motor vehicle tire side shaft connected through main and auxiliary lead screws, a connector, a circular base, an inner coiling reel, an outer coiling reel and a labor-saving handle, wherein the connector is provided with screw holes; the circular base is provided with a plurality of holes; the inner coiling reel and the outer coiling reel have the same shape and are of trapezoidal horn structures; the labor-saving handle is provided with a lengthening handle. The device can realize that an old long cable can be recovered and replaced at one time, a conventional labor coiling and uncoiling mode is substituted by the power of the motor vehicle, the structure is innovative, the assembly and disassembly of the cable are facilitated by using the design of the inner and outer uncoiling reels, and the construction and transportation efficiencies are obviously improved. Different motor vehicles can be adopted, the device is not limited to terrain, the recyclability rate of the cable in construction, transportation and storage processes is greatly improved, the economic benefit is obvious, neat storage and management of the cable are realized, a large amount of storage space is saved, and the storage is convenient, fast and safe.