BBTRZ mineral insulation flexible fireproof cable, using twisted copper conductor, inorganic mica belt as a fireproof layer, mineral compounds for oxygen insulation filling layer and other advanced technology, as well as in the outer coating under the condition of flame combustion, non-melting non-combustible inorganic material and outer protective layer. Suitable for tunnel, bridge, cable trench, cable box, shaft, high-rise building, subway, shopping malls, hospitals, schools, hotels, museums, stations, public entertainment places, data centers and other crowded places, high security and important places of power transmission and distribution line installation.