The invention discloses a shielding type data cable for a mechanical arm. The shielding type data cable for the mechanical arm comprises eight
copper conductor units. The eight
copper conductor units are twisted pairwise to form four symmetric insulation wire pairs, the outer surfaces of the four symmetric insulation wire pairs are wrapped by first
polytetrafluoroethylene bands, and the four symmetric insulation wire pairs are twisted to form a cable core. The outer surface of the cable core is longitudinally wrapped by a second
polytetrafluoroethylene layer, and clearances between the second
polytetrafluoroethylene layer and the four symmetric insulation wire pairs are filled with a plurality of cotton
yarn. A cotton
fiber wire is wound on the outer surface of the second polytetrafluoroethylene layer to form a buffer sliding layer, the winding direction of the cotton
fiber wire is opposite to the twisting direction of the four symmetric insulation wire pairs, a plurality of
metal wires are wound on the outer surface of the buffer sliding layer in parallel to form a
metal shielding layer, and the winding direction of the
metal wires in the metal shielding layer is opposite to that of the cotton
fiber wire. The outer surface of the metal shielding layer is wrapped by a third polytetrafluoroethylene layer. The data cable is small in
friction coefficient, flexible, resistant to stretching and free of friction
static electricity, and the structure and
electrical performance can be kept stable after frequent movement.