The invention discloses to a fireproof high temperature-resistant cable flame-retardant layer. The fireproof high temperature-resistant cable flame-retardant layer is prepared from the following raw materials in parts by weight: 2 to 6 parts of zirconium tetrafluoride, 3 to 8 parts of polycarbonyl diimide, 4 to 7 parts of hydrogenated rosin glycerin, 1 to 4 parts of hemicellulose, 2 to 5 parts ofsodium citrate, 3 to 7 parts of ammonium metavanadate, 5 to 10 parts of activated carbon, 4 to 7 parts of compatilizer, 8 to 15 parts of modified lignocellulose, 6 to 9 parts of silicon carbide, 3 to7 parts of furan resin, 6 to 10 parts of inorganic filler, and 7 to 10 parts of glass fiber. The fireproof high temperature-resistant cable flame-retardant layer has the characteristics that the physical and chemical properties of alloy can be improved, the room-temperature and high-temperature mechanical properties of the alloy is improved, and the like.