Offshore large capacity wind power generation cable

The invention discloses an offshore large capacity wind power generation cable which comprises a number of insulation wire cores. The insulation wire cores are mutually twisted into a cable. Each insulation wire core comprises a conductor, an insulation layer and a copper sleeve from the inside out. Each insulation layer is vacuum. A copper sleeve and a conductor are concentric. A number of isolation struts are connected between a conductor and a copper sleeve. Each isolation strut is made of plastics. The cable is coated by a waterproof tape, an inner sheath, a reinforcement layer and an outer sheath from the inside out. Gaps among the insulation wire cores are filled with carbon fiber composite mandrels. The inner sheath is made of high-foam polyethylene. The reinforcement layer is formed in a tinned copper wire and aramid yarn cross-woven structure. The outer sheath is made of polyether polyurethane. The offshore large capacity wind power generation cable provided by the invention has the advantages of high installed capacity, high tensile strength and good waterproof effect.