Preparation method of environment-friendly biomass plastic material

The invention discloses a preparation method of an environment-friendly biomass plastic material, which comprises the following steps: S101, preparing dialdehyde cellulose: firstly, dispersing 2g of microcrystalline cellulose in 250mL of deionized water under the action of magnetic stirring, then adding dehydrated glucose and sodium periodate, wrapping a reaction container with an aluminum foil to keep the reaction container away from light, and then, carrying out ultrasonic treatment to obtain the dialdehyde cellulose; the preparation method comprises the following steps: performing oxidation treatment on cellulose by using sodium periodate to obtain dialdehyde cellulose, performing reaction on the cellulose at a certain temperature for a certain time to obtain dialdehyde cellulose, and washing the dialdehyde cellulose for multiple times by using deionized water after the reaction is ended, performing oxidation treatment on the cellulose by using sodium periodate to obtain the dialdehyde cellulose, and perfo