Fully biodegradable material and preparation method thereof

The invention provides a full-biodegradable material. The full-biodegradable material is prepared from the following raw materials in parts by mass: 50-70 parts of PBAT, 10-40 parts of thermoplastic starch masterbatch, 10-40 parts of starch, 1-5 parts of a plasticizer, 0.1-1 part of an antioxidant, 0.1-2 parts of a chain extender and 0.1-2 parts of a lubricant. According to the invention, the thermoplastic starch master batch and the starch are compounded and filled, so that the starch can be completely plasticized under the condition of ensuring higher starch content, and the use performance of the material is ensured; under the action of the chain extender, hydroxyl groups in the starch react with terminal carboxyl groups and hydroxyl groups in the PBAT to generate a grafted or segmented copolymer, so that the compatibility of the starch and the PBAT is greatly improved, the filling amount of the starch is further increased, and meanwhile, the use performance of the material is ensured. 本发明提供了一种全生物降解材料，由包括以