The invention relates to the field of
refractory materials, specifically to a low-
smoke halogen-free heat-insulating fireproof cable material used for a fire-resistant cable, and a preparation method and application thereof. The low-
smoke halogen-free heat-insulating fireproof cable material provided by the invention comprises the following raw materials by weight: 55 to 90 parts of
polyolefin resin, 110 to 160 parts of a functional filling material A, 50 to 95 parts of a functional filling material B, 0 to 7 parts of a
flame retardant, 1 to 4 parts of a
coupling agent, 8 to 25 parts of a compatibilizing agent, 1 to 5 parts of a
lubricant and 0.2 to 2 parts of an
antioxidant. The fireproof cable material provided by the invention has good
processing performance; the whole preparation process comprises basic steps like batching, material mixing,
extrusion granulation,
drying and packaging; and the process is simple. The cable material has good flexibility and is convenient to install; during
combustion under the
flame with a temperature of 500 to 1000 DEG C, the cable material does not drip and can generate a hard shell; meanwhile, the cable material has small shrinkage ratio before and after
combustion, so normal operation of internal circuit can be protected; and the cable material can be applied in a fire-resistant filling layer and a heat-insulating fireproof layer of the fire-resistant cable, and has good heat-insulating and fireproof effects.