SCTXG3Y-T-05L pipeline leakage sensing optical cable is a kind of optical cable used for long-distance pipeline leakage monitoring. The optical cable adopts stainless steel seamless steel pipe as the optical fiber protection unit, and is twisted by a plurality of high-strength and high-tensile stainless steel wires, and the outer sheath is extruded with PE outer sheath, which has good mechanical properties such as tensile and compressive resistance. This sensing optical cable is mainly used for leakage monitoring of long oil pipelines, long gas pipelines and long water pipelines, and is suitable for laying close to the outer wall of pipelines.