Traceable biodegradable material and preparation method thereof

The invention discloses a traceable biodegradable material and a preparation method thereof.The traceable biodegradable material is prepared from, by mass, 50-70 parts of PBAT, 20-30 parts of carboxymethyl starch, 8-12 parts of plasticizer, 0.3-1.4 parts of chain extender, 0.4-0.7 part of dispersing agent, 0.03-0.09 part of antioxidant and 0.03-0.06 part of tracer agent.The preparation method of the traceable biodegradable material comprises the steps that all the components are mixed to be uniform, and the traceable biodegradable material is obtained. The preparation method comprises the following steps: adding the raw materials into a twin-screw extruder, extruding and granulating, and preparing the traceable biodegradable material at 135 DEG C. The traceable biodegradable material adopts a starch formula system and is high in degradation rate, carboxymethyl starch can be better compatible with high polymer materials such as PBAT and PLA, and the traceable biodegradable material belongs to an environment-fr