Cold stretching protective film as well as preparation method and application thereof

The invention discloses a cold stretching protective film as well as a preparation method and application thereof, and relates to the technical field of packaging materials. The cold stretching protective film is of a three-layer structure which sequentially comprises an inner layer, a middle layer and an outer layer, the inner layer and the outer layer can play a role in opening and heat sealing, and the middle layer plays a role in stretching and rebounding. Wherein the inner layer and the outer layer are prepared from the same raw materials including metallocene polyethylene, polyethylene and assistant master batch, and the middle layer is prepared from metallocene polyethylene and a block copolymer. The obtained protective film has excellent tensile strength, forging crack elongation performance and breakdown resistance, and more importantly, the protective film is good in tensile resilience and high in resilience speed at the normal temperature, and the protective film has good wrapping performance on a