Abstract:Stevia is the world’s third most common sugar source after sucrose and beet sugar.It is a low-calorie，high-sweetness glycoside compound extracted from Stevia rebaudiana.Stevia contains more than 80% steviol glycosides.The components of steviol glycosides are complex and they contain a variety of monomers.There are currently more than 40 known steviol glycosides，but the most common ones are rebaudioside A，rebaudioside B，rebaudioside C，rebaudioside D，rebaudioside E，rebaudioside F，rebaudioside M，dukside A，stevioside，rubusoside，and stevioside.Steviol glycoside monomers have various uses.For example，they can be used alone as food additives，as physiologically active ingredients，or in monomer conversion media.As steviol glycoside monomers have good development prospects，their separation，purification，and preparation have been the focus of research in recent years.This article discusses the use of chemical，biosynthesis，and transformation methods of steviol glycoside monomer preparation in local and international studies in recent years.Moreover，it provides the theoretical basis and support for the large-scale production and application of steviol glycoside monomers.