Environmentally-friendly mould-proofing wood-plastic composite material and preparation method thereof

The invention discloses an environmentally-friendly mould-proofing wood-plastic composite material and a preparation method thereof. The preparation method comprises the following steps: mixing a plastic substrate, modified wood fiber powder, calcium carbonate, a lubricant, a light stabilizer, a toner and other components in parts by mass; adding the mixture to a high-speed mixer; uniformly stirring; mixing for 6 to 15 minutes at a high speed and at a temperature of 100-120 DEG C and a revolving speed of 700 to 100 revolutions per minute; cooling; discharging to obtain a premix; adding the premix to a parallel twin-screw machine to granulate and extrude, wherein the temperature is controlled to 150-185 DEG C, and screws are at a revolving speed of 280 to 320 revolutions per minute during granulating, the temperature is controlled to 155-190 DEG C, and the screws are at a revolving speed of 10 to 15 revolutions per minute during extruding; thus obtaining the environmentally-friendly mould-proofing wood-plastic composite material. The environmentally-friendly mould-proofing wood-plastic composite material is high in mould proofing performance and mechanical performance, and is environmentally-friendly.