BSR (Biodegradable Starch Resin) is a 100% fully biodegradable starch resin raw material. Its products can be decomposed 100% into carbon dioxide, water and biological matrix by microorganisms. The raw materials do not contain any petroleum-based ordinary plastic and inorganic filler composition that are difficult to be decomposed by natural microorganisms. The composition uses thermoplastic plant fibers to achieve 100% biodegradation.