The invention discloses an ultra-permeable PVC (polyvinyl chloride) film which comprises the following raw materials by weight percentage: 60%-80% of PVC sizing material, 5%-10% of zinc powder, 1.5%-2% of oil, 10%-30% of plasticizer DOP (dioctyl-phthalate) and 2%-4% of cadmium barium zinc compound stabilizer. A preparation method of the ultra-permeable PVC film comprises the following steps of: burdening, banburying, refining in an open way, filtering, extruding, calendaring by six rollers, introducing purified water, drying, shaping, refrigerating, coiling and packing. The PVC film obtained by the invention is small in thickness which can be less than 1.2mm, nontoxic, high in photo-permeability, impact-resistant, tear-resistant, free from combustion, and free from moisture absorption, thereby being particularly suitable for the requirement of various high-speed automatic packaging machinery. Therefore, the film disclosed by the invention can be widely used for the package for the printing industry, the furniture, the drug, the articles of everyday use and the like, and plays a part in moisture resistance and dust resistance.