Preparation method of PLA-based biodegradable composite material

The invention relates to a preparation method of a PLA (polylactic acid)-based biodegradable composite material, and relates to a preparation method of a biodegradable composite material, and the method comprises the following steps: carrying out melt blending on dried PLA, PCL (polycaprolactone), a bio-based compatibilizer and other assistants according to a certain mass ratio to prepare the biodegradable PLA/PCL composite material. The auxiliary agent is a green and safe bio-based material and is completely nontoxic and harmless, after the auxiliary agent is introduced into a PLA/PCL matrix, the intermolecular force between two phases can be remarkably enhanced, and then various properties of the composite material are greatly improved. The preparation process is simple and convenient to operate, and the obtained composite material has excellent impact strength, elongation at break, processability, optical performance and the like. The innovative technology is very suitable for industrial large-scale produc