High-temperature stainless steel tube armored optical cable (GTXTG3Y) is composed of stainless steel seamless steel tube with built-in temperature-resistant optical fiber, and the commonly used temperature-resistant types are 85°C, 150°C and 300 C. The seamless steel tube is filled with special fiber paste buffer layer, which can form good protection for the optical fiber, at the same time, it can prevent water in the longitudinal direction, and the outer layer is twisted with steel wire and sheathed with temperature-resistant material. It has high tensile strength, crushing resistance, lateral waterproof and waterproof properties.