The invention provides a method for preparing a PVC profile with the anti-aging effect and belongs to the technical field of PVC profile production. The method is prepared from, by weight, 90-110 parts of polyvinyl chloride resin, 50-60 parts of ardealite, 3-8 parts of titanium dioxide, 1-3 parts of polyvinyl alcohol, 1-2 parts of polylactic acid, 1-4 parts of stabilizer, 0.5-2 parts of antioxidant, 1-2 parts of lubricant and 1-2 parts of composite plasticizer. The method includes the steps of ardealite treating, mixing, extrusion forming and finished product forming. Polyvinyl alcohol is used for modifying ardealite, so that ardealite is used for replacing calcium powder used in the preparation process of a traditional PVC profile, the source of calcium powder for PVC is expanded, the cost of the calcium powder for PVC production is reduced, comprehensive utilization ways of ardealite are expanded, the comprehensive utilization rate of ardealite is increased, in cooperation with titanium dioxide, polylactic acid, stabilizer, antioxidant, lubricant and composite plasticizer, the notch impact strength, tensile strength, bending strength, bending modulus and elongation at break are increased to be better, the service life is longer, and the better anti-aging characteristic is achieved.