Optical cable with loose tube optical unit

The invention provides an optical cable with a loose tube optical unit. The optical cable comprises a plurality of cylinder components, a plurality of first water-blocking yarns, an outer protective sleeve, a supporting piece and a water-blocking tape, the cylinder parts comprise a plurality of first cylinder parts and a plurality of second cylinder parts, each first cylinder part comprises a loose tube, a plurality of optical fibers and a plurality of second water-blocking yarns, the loose tubes are arranged on the peripheries of the optical fibers, the optical fibers are arranged at the central positions of the first cylinder parts, and the second water-blocking yarns are arranged at the edge positions of the first cylinder parts; the cylinder component is arranged around the supporting piece in a surrounding mode, the water-blocking tape is arranged on the periphery of the cylinder component, the outer protective sleeve is arranged on the periphery of the water-blocking tape, and the first water-blocking y