The invention relates to a PVC (Poly Vinyl Chloride) profile of a metal core. The PVC profile is characterized by comprising a first PVC plastic material layer, a metal core layer, a thermal insulating layer and a second PVC plastic material layer, all of which are orderly arranged from inside to outside, wherein the first PVC plastic material layer comprises the following components in percentage by weight: 80-85% of polrvinyl chloride, 10-15% of CaCO3, 3-5% of titanium dioxide, and 0.5-0.7% of antioxidant; the two sides of the metal core layer are coated with an adhesive containing no solvent; the second PVC plastic material layer comprises the following components in percentage by weight: 60-80% of PVC resin, 15-33% of dioctyl phthalate, 0.5% of liquid calcium and zinc, 2% of epoxy soybean oil, 0.2-0.6% of paraffin wax, 0.5-2% of light calcium carbonate, 2% ofa thermal stability, 2-2.5% of an antioxidant and 5-7% of a fire retardant. The PVC profile of the metal core provided in the invention is good in toughness, not easy to damage, and high in safety factor, and is energy-saving and environment-friendly.