The invention provides a low-smoke, halogen-free and flame-retardant cable material and a preparation method thereof. The material is prepared from the following raw material by weight parts: 34-38 parts of ethane-vinyl acetate copolymer, 24-27 parts of linear low-density polyethylene, 12-14 parts of ABS, 2-3 parts of zinc oxide, 50-54 parts of attapulgite powder, 12-14 parts of aluminium hydroxide, 1-2 parts of an antioxidant OD, 1-2 parts of an antioxidant ODA, 1-2 parts of an accelerator TETD, 5-7 parts of glycerol triglycerol ester, 3-4 parts of vinyl triethoxysilane, 1-2 parts of phenyl triethoxysilane, 3-4 parts of 2-methyl methacrylate, 1-2 parts of ethene diamine, 13-16 parts of carbon black N 220, 10-12 parts of carbon black N 339, 3-5 parts of polyethylene wax, 1-2 parts of ethylene bisstearamide, 1-2 parts of dimethyl tin dichloride, 4-6 parts of polyisobutylene and 6-8 parts of modified diatomite. According to the invention, the raw materials are reasonable in formula; the produced cable material is high in mechanical property, high temperature resistant, high in flame-retardant performance, and low-smoke and nontoxic during combustion, with a flame retardation grade being V2-V0.