The invention relates to a halogen-free flame-retardant ceramic polyolefin cable material for fire-resisting cables and a preparation method for the halogen-free flame-retardant ceramic polyolefin cable material. The halogen-free flame-retardant ceramic polyolefin cable material is prepared from the following materials in parts by weight: an ethylene-vinyl acetate copolymer, an ethylene-alpha-olefin copolymer, high-density polyethylene resin, maleic anhydride grafted amorphous polyolefin, mica powder, ceramic powder, glass powder, calcium oxide, zinc oxide, melamine cyanurate, microencapsulated red phosphorus, nano aluminum hydroxide, organic montmorillonite, multi-walled carbon nanotubes, an antioxidant, a silane coupling agent and lubricant silicone master batch, wherein the melt flow rate is 3 to 5 grams per 10 minutes; the ethylene-alpha-olefin copolymer is either an ethylene-alpha-propylene copolymer or an ethylene-alpha-octylene copolymer or a mixture which is prepared through mixing the ethylene-alpha-propylene copolymer and the ethylene-alpha-octylene copolymer according to any weight ratio; and the glass powder is low-melting-point glass powder and has the melting point of 500 to 800 DEG C. The halogen-free flame-retardant ceramic polyolefin cable material is transformed into a hardy ceramic protective layer through ceramization after the halogen-free flame-retardant ceramic polyolefin cable material catches fire in case of high temperature, and the ceramic protective layer has certain mechanical strength, so that the normal operation of electric-line cable lines is guaranteed.