Super-wide-breadth metallocene polyethylene greenhouse film resin composition and preparation method thereof

The invention discloses a metallocene polyethylene greenhouse film resin composition, which comprises the following components based on metallocene linear low-density polyethylene (mLLDPE) being 100% by weight: 1) mLLDPE, wherein the flow rate of mLLDPE melt is 0.5-10 g/10 minutes; 2) 0.11-0.37% of compound cross-linking agent composed of 1,1-dimethylethyl-hydrogen peroxide and tert-butyl peroxyacetate; and 3) 0.011-0.027% of dibenzoyl peroxide. The strength of the greenhouse film resin composition melt is increased by more than 2 times as compared with that of mLLDPE, and high-strength little-fisheye super-wide-breadth greenhouse film (breadth not less than 14m and thickness not less than 60 mu m) can be prepared by blowing the greenhouse film resin composition without adding any other substances. The invention further discloses a preparation method of the composition.