The invention relates to a double-faced combined thermal insulation protective component forming method and a dedicated device thereof, and belongs to the technical field of technological equipment. The double-faced combined thermal insulation protective component is mainly characterized by comprising an upper heating plate, forming rods, an upper mold core, an upper mold core fixing plate, a guide pillar, a stop block, a movable forming plate, a metal insert, movable positioning pins, rectangular springs, a guide sleeve, a mold cavity block, a mandril, a lower heating plate, a lower mold core I, and a lower mold core II, wherein the upper mold core and the lower mold cores as well as the metal insert form an upper forming cavity and a lower forming cavity, the upper heating plate and the lower heating plate are respectively used for heating the forming rods, the upper mold core and a lower mold core assembly; the forming rods and the upper mold core are used for pressing a thermal insulation carbon fiber material in the upper forming cavity and the lower forming cavity, and the thermal insulation carbon fiber material subjected to heat preservation and pressure maintaining is naturally formed and cured under the room temperature condition. The double-faced combined thermal insulation protective component has the advantages of being reasonable in structure, convenient to use and maintain, fast and convenient in production processing, high in precision and the like.