The invention discloses an irradiation crosslinking power cable material for numerical control equipment and a preparation method of the material. The irradiation crosslinking power cable material comprises, by weight, 52-60 parts of superfine polyacrylate rubber powder, 54-65 parts of triallyl isocyanurate, 40-58 parts of chlorinated polyethylene elastomers, 54-60 parts of vinyl trimethoxy silane, 30-50 parts of dioctyl adipate, 80-90 parts of aluminum hydroxide, 10-18 parts of wollastonite in powder, 15-20 parts of dihexadecyl peroxide dicarbonate ester, 10-18 parts of phosphite ester, 2-5 parts of zinc borate micro-powder, 5-8 parts of cyclohexane 1, 2 dioctyl phthalate dinonyl ester, 2-5 parts of benzotriazole, 3-7 parts of lead sulfate tribasic, 3-5 parts of monoglyceride stearate, 7-12 parts of chlorinated paraffin, 4-10 parts of tetrapod-like vinyl triethoxy silane whiskers, 3-6 parts of deca-brominated diphenyl ether, 2-3 parts of semi-reinforced carbon black and 1-3 parts of auxiliaries. The cable material prepared by the simple easily-operated irradiation crosslinking preparation method has good corrosion resistance and flame resistance.