The invention discloses a flame-retardant aging-resistant cable material and a preparation method thereof and relates to the technical field of cable materials. The flame-retardant aging-resistant cable material is prepared from the following raw materials in parts by weight: 30-45 parts of epoxy resin, 20-32 parts of polyurethane rubber, 23-35 parts of silicone grease, 18-26 parts of attapulgite,15-22 parts of ceramic fibers, 20-28 parts of calcium silicate, 8-16 parts of maifanite, 18-26 parts of nano-silica, 8-18 parts of nano-titanium nitride, 15-22 parts of magnesium hydroxide, 15-22 parts of aluminum hydroxide, 5-12 parts of phosphite, 8-13 parts of octadecanol ester, 4-8 parts of citric acid, 7-10 parts of sodium citrate, 5-9 parts of silane coupling agent, 2-5 parts of lubricant,1.8-3.6 parts of curing agent, 3.2-5.5 parts of flame retardant, 1.2-2.8 parts of initiator and 2.4-3.8 parts of ultraviolet absorbent. The cable material disclosed by the invention is good in flame-retardant effect and high in corrosion resistance and aging resistance.