Cable sheath sizing material and preparation method thereof

The invention discloses a cable sheath sizing material and a preparation method thereof. The raw materials of the cable sheath sizing material comprise the following components in parts by weight: 85to 100 parts of ethylene vinyl acetate-graphene rubber master batch, 5 to 20 parts of nitrile rubber, 5 to 10 parts of maleic anhydride grafted ethylene acetic ether copolymer, 5 to 10 parts of a lowtemperature modifier, 5 to 10 parts of a low temperature plasticizer, 40 to 80 parts of a phosphorus-nitrogenous flame retardant, 15 to 30 parts of a reinforcing agent, 1 to 2 parts of an anti-aging agent and 3 to 5 parts of a vulcanization system addition agent. The sheath sizing material disclosed by the invention has the characteristics of no halogen, low smoke, flame retardance, fuel oil resistance, mineral oil resistance, low temperature resistance (a temperature resistance range being -40 to 90 DEG C), high mechanical performance and the like, and can effectively meet the working condition requirement of locomoti