High-separation multilayer joint-extrusion shrink film

The invention discloses a high-separation multilayer joint-extrusion shrink film, which comprises an outer surface layer, a separation layer, a heat sealing layer and two bonding layers. The two bonding layers are respectively located between the separation layer and the outer surface layer and between the separation layer and the heat sealing layer, the separation layer is made of one of or a combination of two of ethylene vinyl alcohol (EVOH) resin, polyvinylidene chloride resin and modified polyamide resin, the thickness of the separation layer is 10%-45% of the total thickness, the thickness of the outer surface layer is 3%-5% of the total thickness, the thickness of the heat sealing layer is 25%-35% of the total thickness, the thickness of the bonding layers is 10%-30% of the total thickness, and the number of the separation layer is one or three. The outer surface layer of the film is made of high-melting-point resin to overcome the shortcoming that users are easy to burn during a using process of products, simultaneously oxygen and water vapor separation performance are good, the anti-puncturing effect and heat sealing strength are good, and the high-separation multilayer joint-extrusion shrink film can be suitable to vacuum shrink package of chilled pork, cheese products and seafood products.