The invention discloses a novel polyvinylidene chloride-based coating preservation packaging material for egg products and a preparation method thereof and belongs to the technical field of food packaging. The method comprises the steps that nano-SiO2 and nano-montmorillonite are added to absolute ethyl alcohol, polyvinylidene chloride emulsion is modified after ultrasonic dispersion through ultrasonic waves, and then polyvinylidene chloride is prepared into the stable coating packaging material with a photocatalytic bacteriostatic action. After being cleaned and air-dried, the surfaces of the egg products are coated with polyvinylidene chloride with photocatalytic bacteriostasis, and therefore the refreshing time of the egg products is prolonged. According to the technical scheme, the polyvinylidene chloride emulsion is a food packaging material, will not move in the egg products, and is a novel material suitable for fresh-keeping packaging of the egg products.