Special material for potato covering cultivation full-biodegradable mulching film and preparation method of special material

The invention discloses a special material for a potato covering cultivation full-biodegradable mulching film and a preparation method thereof, and the special material is prepared by melting, blending and extruding poly (butylene adipate-co-terephthalate), polyglycolic acid, a compatilizer, an anti-blocking agent, a light stabilizer, a dispersing agent, a lubricating agent and the like. The material disclosed by the invention is researched and developed according to the growth cycle and characteristics of potato cultivation and is specially used for potato mulching cultivation mulching film production. Popularization and application prove that the mulching film produced by adopting the material is naturally embrittled and broken within 90 days when being used for potato cultivation. A soil burying test shows that the biodegradation can be completely realized within one year. Through contrast tests, various properties of the material reach or exceed those of a polyethylene mulching film material, and the mate