The invention provides a novel plastic substitute material capable of being used as a mulching film. The novel plastic substitute material is composed of 20-51% of inorganic powder, 1-3% of an anti-blocking agent, 1-10% of a coupling agent, 3-10% of LDPE, 5-20% of carrier resin, 4-20% of a reinforcing material, 1-10% of X1, 1-10% of X2 and 1-10% of X3. The mulching film prepared from the materialhas the advantages of heat preservation, moisture preservation, freezing prevention, insect prevention, disease resistance, weeding, ventilation, fertilization, high efficiency, environmental protection, soil loss prevention, soil hardening improvement and the like. The prepared polyethylene blow-molded agricultural ground covering film has the thickness of 1 or 1.2 filaments, the appearance (uniform color and luster and no obvious holes or bubbles), the mechanical property (the tensile load is greater than or equal to 5.0 N and the breaking strain is greater than or equal to 400%), the weather resistance (stable chemical properties after long-time exposure), the thickness deviation (the thickness limit deviation is less than or equal to 0.005 mm), the width limit deviation (the limit deviation is less than or equal to 10 mm within the width range of 800-1500 mm), the net mass limit deviation (when the mass of each roll is less than or equal to 10 kg, the limit deviation is less than or equal to 0.10 kg) and the like meet the GB / T13735-2017 standard. Meanwhile, the biodegradable period of the plastic substitute material is short, and the plastic substitute material is environment-friendly.