Abstract: In order to improve the reliability and service life of large-length mineral insulated heating cables, a stainless steel sheathed mineral insulated heating cable was trial-produced and developed by referring to the continuous manufacturing process of mineral insulated fireproof cables. The trial production uses the existing FHL-35 mineral insulated cable copper strip longitudinal clad welding production line as a trial production platform, and the trial production platform is partially modified due to the large difference in the mechanical properties of the metal sheath and core wire materials of mineral insulated fireproof cables and heating cables. The samples were trial-produced, and the samples were tested and analyzed with reference to the relevant standards, and the direction of subsequent improvement was proposed.