The invention discloses an elevator vertical trailing digital communication cable. The cable includes an elastic outer sheath, a shielding layer, an elastic inner sheath and a plurality of twisted wires which sleeve one another from outside to inside sequentially; the outer surfaces of the wires are covered with honeycomb-shaped insulation layers; an even number of circular tubular elastic auxiliary sleeves extend out from the elastic outer sheath; first steel stranded ropes are embedded in the elastic auxiliary sleeves; the elastic auxiliary sleeves are symmetrically arranged on the outer surface of the elastic outer sheath; an inner annular cavity is defined in the elastic outer sheath; and the inner annular cavity is detachably filled with a flexible layer. The cable of the invention can steadily follow the lifting and descending of an elevator, and has more suitable flexibility and strength, and can ensure that signals are not be interfered.