The invention relates to a preparing method of low-temperature-resistance anti-ageing floor leather, and belongs to the technical field of preparation of flooring materials. The preparing method comprises the steps of firstly, preparing a silicon dioxide sol precursor, soaking basalt fibers in the silicon dioxide sol precursor to obtain an ultrasonic treatment liquid, mixing EPDM original gum, modified zeolite powder, zinc oxide and the like to obtain a mixed raw material, mixing the mixed raw material with the ultrasonic treatment liquid, then sending the mixture in a three-layer compound mold to prepare material strips, and conducting high-energy irradiation crosslinking sizing to obtain the low-temperature-resistance anti-ageing floor leather. According to the preparing method, the ultrasonic treatment liquid finally becomes a hard fiber layer of the floor leather, and after a silicon dioxide coating is introduced to the surfaces of the basalt fibers, the tensile elasticity and mechanical strength of the floor leather are improved; the EPDM original gum is utilized for conducting mechanical modification on polyvinyl chloride, and the low-temperature tensile property and low-temperature flexibility of the polyvinyl chloride can be effectively improved through EPDM; the aluminum-series modified zeolite powder further improves the tensile elasticity of the whole floor leather at the low temperature, so that the ageing resistance of the polyvinyl chloride is improved, and the application prospect is wide.