The invention relates to the field of polymer materials, in particular to a cable sheath material resistant to seawater corrosion. The cable sheath material resistant to seawater corrosion is composedof the following raw materials: in parts by weight, 30-50 parts of modified polytetrafluoroethylene, 8-15 parts of aluminum bronze, 45-70 parts of nitrile rubber, 3-9 parts of ceramsite, 12-18 partsof glass fiber, 15-22 parts of phenolic resin, 5-11 parts of silica sol, 10-18 parts of crosslinked polyethylene, 2-6 parts of alumina ceramic powder, 0.3-1.7 parts of potassium titanate whisker, 11-17 parts of silicone, 1-6 parts of epoxidized soybean oil and 1-8 parts of a silane coupling agent. The cable sheath material resistant to seawater corrosion has reasonable component ratios, excellentchemical stability, excellent corrosion resistance, excellent anti-aging performance, high yield, high hardness, good wear resistance and long service life.