The utility model discloses a 500kV ultrahigh-voltage water-blocking, rat-proof and termite-proof cross-linked cable. The cable comprises a split conductor, a conductor shielding layer, an insulatinglayer, an insulating shielding layer, a metal sheath layer and a rat-proof and termite-proof sheath layer, a semi-conductive Tetoron wrapping tape and semi-conductive nylon wrapping tape composite layer, a conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially arranged on the outer side of each split conductor from inside to outside. A semi-conductive water-blocking tape and water-blocking expansion buffer tape composite layer, a metal sheath layer, an asphalt anti-corrosion layer, a PVC sheath layer, a rat-proof termite-proof sheath layer and a graphite layer are sequentially arranged on the outer side of the insulating wire core from inside to outside. The anti-termite cable is mainly used in 500kV ultra-high voltage power transmission of substations and urban power grids in areas with dense mice and ants, can prevent termites from damaging the cable, and ensures safe and reliable operation of the cable.