High-temperature-resistant nuclear-grade instrument cable

The utility model relates to the field of instrument cables, in particular to a high-temperature-resistant nuclear-grade instrument cable, which comprises three groups of conductors, a flexible plastic sleeve, a sheath layer and an anti-radiation layer, the conductors are wrapped by an inner protective layer, the inner protective layer is wrapped by the flexible plastic sleeve, the outer side of the flexible plastic sleeve is provided with an outer filling layer, and the outer filling layer is provided with an inner protective layer. The outer side of the outer filling layer is wrapped with an outer waterproof layer, the outer side of the outer waterproof layer is wrapped with an outer shielding layer, the outer side of the outer shielding layer is wrapped with an anti-radiation layer, the outer side of the anti-radiation layer is extruded and wrapped with a reinforcing braid layer, and the outer side of the reinforcing braid layer is wrapped with a high-temperature-resistant flame-retardant layer. The benefi