The invention relates to a high-filling fruit and vegetable packaging fresh-keeping plastic film and a preparation method thereof, wherein the high-filling fruit and vegetable packaging fresh-keepingplastic film comprises, by weight, 10-40 parts of a polymer resin, 40-85 parts of an inorganic filler, 2.8-10 parts of a dispersing aid, and 0.5-5 parts of a lubricant, wherein the dispersing aid at least comprises one selected from white oil, paraffin wax, PE wax and PP wax, and the lubricant at least comprises one selected from silicone oil, fatty acid amide, oleic acid, oleamide, stearic acid,sodium stearate, calcium stearate and zinc stearate. According to the present invention, the suitable dispersing aid and the suitable lubricant are selected, the suitable ratio is controlled, and theratio of the inorganic filler to the polymer resin is increased, such that the gas permeation and the mechanical property of the high-filling fruit and vegetable packaging fresh-keeping plastic film are improved.