The invention discloses an anti-cracking high density polyethylene cable material and a preparation method thereof. The anti-cracking high density polyethylene cable material is prepared from the following raw materials in parts by weight: 50-70 parts of high density polyethylene, 20-30 parts of ethylene-vinyl acetate copolymer, 15-20 parts of ethylene-tetrafluoroethylene copolymer, 10-15 parts of methyl methacrylate-acrylonitrile-butadiene-styrene copolymer, 5-10 parts of ethylene-vinyl acetate copolymer graft maleic anhydride, 10-15 parts of magnesium hydroxide, 5-10 parts of red phosphorus, 4-6 parts of zinc borate, 3-5 parts of ethylene bis stearamide, 2-3 parts of calcium stearate, 10-15 parts of activated aluminum oxide, 2-4 parts of dicumyl peroxide, 1-2 parts of di-n-butyltin dilaurate, 15-20 parts of epoxidized soybean oil, 10-15 parts of nano wollastonite, 5-10 parts of coarse whiting powder, 4-8 parts of basic magnesium sulfate whisker, 1-2 parts of antioxidant 1035, 1-2 parts of antioxidant DSTP and 3-6 parts of compound filler. The cable material disclosed by the invention has excellent anti-cracking performance, good mechanical property, high/low-temperature resistance and bending property, can work for a long period of time in the working environment of -50 to 130 DEG C without cracking, can bear various bends, is durable and has broad application prospect.