Steel sleeve steel directly buried insulation steel pipe is a new laying technology suitable for underground directly buried pipelines. The prefabricated buried steel sleeve steam insulation pipeline made of high-temperature centrifugal glass wool insulation and fiberglass winding technology can transport steam or other thermal media with a pressure of 2.5 MPa and below 350 degrees Celsius. The product structure of this steel sleeve steel directly buried insulation steel pipe includes base pipe, sliding bracket, glass wool, reflective layer, insulation layer