High-flame-retardant special engineering cable and preparation method thereof

The invention discloses a high-flame-retardant special engineering cable and a preparation method thereof, the high-flame-retardant special engineering cable comprises a cylindrical cable, the cylindrical cable comprises an outer protective layer, an armor layer, an inner protective layer, a wrapping layer, an insulating layer and a conductor, the outer protective layer is a shell of the cylindrical cable, the armor layer is arranged on the inner side of the outer protective layer, the inner protective layer is arranged on the inner side of the armor layer, the wrapping layer is arranged on the inner side of the inner protective layer, and the insulating layer is arranged on the inner side of the outer protective layer. The three conductors wrapped by the insulating layers are arranged in a columnar space formed by the wrapping layer to jointly form the columnar cable, the conductors are formed by drawing oxygen-free copper rods into copper monofilaments of 3mm or below through a continuous annealing wire dra