The invention relates to the technical field of polymer environment-friendly materials, in particular to an environment-friendly mulching film. The mulching film is prepared from linear low-density polyethylene, polypropylene resin, metamorphic starch, maleic anhydride grafted polyethylene, a polyester compatibilizer, a plasticizer, a lubricant and an anti-aging agent. According to the polyester compatibilizer, glycerin and adipic acid monomers are selected for a condensation reactor to obtain hydroxylated polyester; the lubricant is hydroxy silicone oil; the plasticizer is tributyl citrate, epoxidized soybean oil or dibutyl phthalate; the anti-aging agent contains an antioxidant and an ultraviolet absorber, wherein the mass ratio of the antioxidant to the ultraviolet absorber is 3:1; theantioxidant is selected from an antioxidant 1076, an antioxidant 164 or an antioxidant TNP; the ultraviolet absorber is selected from UV-531 or UVP-327. The thin film material has high strength and toughness, outstanding water proofing and water retention performance and a high degradation rate and natural degradation rate.