The invention provides a wire and cable material and a preparation method thereof, and relates to the field of communication equipment. The wire and cable material comprises, by weight, 50-60 parts of polyvinyl chloride resin, 40-60 parts of polyester fiber, 35-55 parts of ceramic fiber, 15-23 parts of heavy calcium carbonate, 11-19 parts of active nano-calcium carbonate, 3-7 parts of kaolin, 0.8-1.2 parts of polyethylene wax, 13-17 parts of toner, 4-6 parts of polymeric plasticizer, 0.5-0.9 part of coupling agent, 0.6-0.8 part of flame retardant, 0.5-0.9 part of antioxidant, 0.7-0.9 part of light stabilizer and 0.4-0.8 part of heat stabilizer. The preparation method includes the following steps of: (1) weighing the raw materials, (2) stirring, (3) banburying, (4) extruding, (5) granulating, cooling and packaging. The problems that as existing high-temperature-resistant wires and cables are hard, the insulating layers are prone to cracking, the conductors are easily broken and the safety performance is not good during use under the action of external forces such as bending are solved.