Flame-retardant three-layer insulated wire structure

The utility model provides an insulated wire structure, and particularly relates to a flame-retardant three-layer insulated wire structure. Comprising a three-layer insulated wire body, a wire length mark is arranged on the three-layer insulated wire body, the three-layer insulated wire body comprises a conductor, the conductor is sleeved with a first insulating layer, the first insulating layer is sleeved with a second insulating layer, the second insulating layer is sleeved with a third insulating layer, and the third insulating layer is sleeved with a second insulating layer. The third insulating layer is sleeved with an inner sheath, the inner sheath is sleeved with an inner semiconductor shielding layer, the inner semiconductor shielding layer is sleeved with a waterproof layer, the waterproof layer is sleeved with an outer semiconductor shielding layer, and the outer semiconductor shielding layer is sleeved with an inner compression-resistant layer. The outer surface of the inner compression-resistant l