Anti fog vegetable preservation bags use transparent plastic films, sheets, or boards. In humid environments, when the humidity reaches below the dew point, a layer of fine water droplets will condense on the surface, making the surface blurry and atomizing, hindering the transmission of light waves. For example, when using film packaging products, the contents may not be visible due to fogging, and the resulting droplets can also easily cause the contents to rot and damage. Anti fogging agent is a type of additive used to prevent the above-mentioned fogging phenomenon. They are surfactants with hydrophilic groups that can be oriented on the surface of plastics, with hydrophobic groups facing inward and hydrophilic groups facing outward, making it easy for water to wet the plastic surface. The condensed fine water droplets can quickly diffuse to form extremely thin water layers or large water droplets flowing down the thin film. This can avoid the atomization caused by the light scattering of small water droplets, and prevent condensed water droplets from falling onto the packaging material, damaging it.