Biodegradable material as well as film product and application thereof

The invention belongs to the field of degradable materials, and relates to a biodegradable material. Specifically, the invention relates to a cellulose acetate-based degradable composite material as well as a film product, a preparation method and application thereof. The biodegradable material provided by the invention comprises the following components: a) cellulose acetate and at least one degradable polyester material; and b) at least one compatibilizer capable of improving the interfacial compatibility of the cellulose acetate and the degradable polyester. The degradable composite material containing cellulose acetate and polyester has the beneficial effects that the tensile strength of a blend is improved, the Young modulus is improved, and the elongation at break is kept. The biodegradable material disclosed by the invention is used for products subjected to extrusion, injection molding or plastic uptake processes, and can improve the polarity of cellulose acetate and polyester, improve the interfacial