Polylactic acid composition for industrial 3D printing and preparation method thereof

The invention relates to a polylactic acid composition for industrial 3D printing and a preparation method thereof. The polylactic acid composition comprises the following components in parts by weight: 40-80 parts of polylactic acid, 1-20 parts of a reinforcing agent, 1-30 parts of an anti-warping stabilizer and 1-30 parts of wood fiber master batch. The polylactic acid composition for industrial 3D printing has the advantages of no warping during printing, high strength and low density of a printed piece, and good heat resistance and degradability; the polylactic acid composition is green, safe and environment-friendly, the production technological process is simplified, the processing efficiency is high, the requirement for needed equipment is low, operation is easy, printed products can be directly used after being simply processed and can be perfectly applied to the field of large industrial 3D printed products such as molds and furniture, and the printed products can partially replace wood molds, sand m