The invention provides an environment-friendly cable dehumidifying and drying device which comprises a bottom plate, a first heating device, a heat conducting device, a support device, a second heating device and an air intake device. A first support block, a first roller, a first support rod and a second support rod are arranged on a bottom plate. The first heating device comprises a first frame body, a first heat conducting plate, a first heating bar and a first heat conducting rod. The heat conducting device comprises a first vertical rod, a second roller, a second heat conducting rod, a second heat conducting plate and a first spring. The support device comprises a third support rod, a first fixation rod, a first horizontal plate and a first connecting rod. The second heating device comprises a second frame body and a second heating bar. The air intake device comprises an air intake pipe, a fan which is arranged on the air intake pipe, a second fixation rod which is located on the right side of the air intake pipe, a filter which is accommodated in the air intake pipe, a bracket which is located on the left side of the fan, and a third fixation rod which is located on the left side of the bracket. According to the invention, a cable can be fast, effectively and evenly dried.