Three-layer co-extrusion heat shrinkage film

The invention discloses a three-layer co-extrusion heat shrinkage film, and belongs to the technical field of three-layer co-extrusion heat shrinkage films. The haze reduction effect can only be improved along with the reduction of the thickness of the film, and the haze of the heat shrinkage film cannot be directly reduced to improve the transparency. The three-layer co-extrusion thermal shrinkage film sequentially comprises an inner layer, a middle layer and an outer layer, the inner layer and the outer layer respectively contain 20-50 wt% of metallocene polyethylene resin, 0.06-0.1 wt% of hexahydrophthalic acid calcium and 50-80 wt% of high pressure polyethylene, the middle layer contains 50-99.9 wt% of metallocene polyethylene resin and 0.06-0.1 wt% of hexahydrophthalic acid calcium, and the outer layer contains 20-50 wt% of metallocene polyethylene resin, 0.06-0.1 wt% of hexahydrophthalic acid calcium and 50-80 wt% of high pressure polyethylene. The metallocene polyethylene resin contains 0.04 wt% to 0.0