Directly buried stainless steel tube armored optical cable (GTXTG33Y) is a seamless tube made by putting 250μm colored optical fiber into loose-tube stainless steel tube, and longitudinally welding the steel tube strip by laser after molding. The special fiber paste is filled in the middle, which can protect the optical fiber well and prevent water vertically. It adopts reinforced double-layer steel stranded wire +PE sheath structure, which has the characteristics of compression resistance, tensile resistance, waterproof and moistureproof, rat bite prevention and corrosion resistance, and can be used in harsh environment.