The structure of GYXTC8S optical cable is to connect 250 μ The m optical fiber is inserted into a loose tube made of high modulus material, and the loose tube is filled with waterproof compound. The loose tube is filled with waterproof compound to ensure compact and longitudinal water blocking. The center of the cable core is a metal reinforced core, and the loose tube (and filling rope) is twisted around the center reinforced core to form a compact and circular cable core. The cable core is longitudinally wrapped with a layer of coated aluminum tape (ALP), and extruded with steel wire strands to form an 8-shaped polyethylene (PE) sheath.