Bridge sling and stay cable wrapping fireproof protection system and installation method

The invention discloses a bridge sling and stay cable wrapping fireproof protection system and an installation method, and the device comprises a heat insulation layer (2) which is arranged on the surface of a bridge sling or stay cable body (1) and located on the inner layer of the protection system, and the heat insulation layer (2) is heat insulation felt or heat insulation aerogel; the heat insulation felt is made of refractory fibers including ceramic fibers or basalt fibers, and the heat insulation aerogel is formed by composite modification of high silica fibers or organic fibers; the refractory fiber cloth (4) is positioned on the outer layer of the protection system and is made of refractory fibers including ceramic fibers or basalt fibers; the preassembled plastic bag (3) is arranged between the heat insulation layer (2) and the refractory fiber cloth (4), and the preassembled plastic bag (3) is filled with vulcanized flame-retardant sealant. The fireproof materials are integrally fixed in place, on