The invention relates to cable materials and a preparation method thereof, in particular to a low-smoke flame-retardant rubber cable material and the preparation method thereof. The low-smoke flame-retardant rubber cable material is composed of the following raw materials including, by weight, 40-100 parts of natural rubber, 40-80 parts of chloroprene rubber, 30-40 parts of nitrile rubber, 4-5 parts of stearic acid, 4-5 parts of a coupling agent, 5-6 parts of zinc oxide, 5-6 parts of antioxidant BHT, 3-5 parts of accelerator, 100-120 parts of a fire retardant and 60-100 parts of a filling agent. The main component of the natural rubber is polyisoprene which is one of the air-dried rubber piece and crepe; the accelerator is rubber accelerator TMTD; the chloroprene rubber is an elastic body generated through alpha-polymerization with chloroprene as a main raw material. The low-smoke flame-retardant rubber cable material and the preparation method thereof have the advantages that low-smoke, fire-retardant and weather-resistance effects of the cable material are achieved, environmental-protection and safety are achieved, the physical and mechanical properties and the machining processing property of the prepared cable material are good, the machining is easy, the raw materials are more environmental, the toxicity is low, and the popularization strength is large.