Biodegradable functional masterbatch includes PLA/PCL masterbatch, biodegradable toughening masterbatch eSunBio5821E, biodegradable compatibilizer eSunBio5004K, luminous masterbatch eSunBio5022L. Among them, the toughening masterbatch eSunBio5821E is mainly used for the toughening of PLA products with various molding methods.