High-flame-retardant cable

The invention discloses a high-flame-retardant cable, and the cable comprises a first halogen-free low-smoke flame-retardant polyolefin layer, a first halogen-free low-smoke flame-retardant glass fiber belt layer, a second halogen-free low-smoke flame-retardant polyolefin layer, a second halogen-free low-smoke flame-retardant glass fiber belt layer and an inorganic filling layer which are sequentially arranged from outside to inside, wherein the inorganic filling layer is internally provided with a plurality of insulating sleeves in a laying manner; and conductors are arranged in the insulating sleeves. The cable provided by the invention has excellent flame retardant property, flame does not burn along the cable when meeting fire, the heat release rate of the cable is small, the smoke amount is small, and secondary disasters brought by the cable to the external environment are effectively relieved, so the total heat release amount of the cable is less than or equal to 2.0 MJ, the carbonization height is less