PVC (polyvinyl chloride) composite film and preparation method thereof

The invention relates to the technical field of composite film preparation, and discloses a PVC composite film which comprises a PVC composite film body, and the PVC composite film body comprises a base material; an anti-corrosion layer for achieving an anti-corrosion effect is fixedly adhered to the top of the base material; a flame-retardant layer for achieving a flame-retardant effect is fixedly adhered to the top of the anti-corrosion layer; the top of the flame-retardant layer is fixedly provided with a wear-resistant layer used for avoiding being worn, the thickness of the base material is twice that of the anti-corrosion layer, and the thicknesses of the anti-corrosion layer, the flame-retardant layer and the wear-resistant layer are consistent; the anti-corrosion layer is prepared from the following raw materials in parts by weight: 10 to 30 parts of fiber; and 5 to 25 parts of resin. The anti-corrosion layer prepared from the fibers, the resin and the anti-corrosion particles is better in anti-corros