Abstract: In this paper, studies were carried out on the extraction and purification process of starch of Siraitia grosvenorii’s root. Survey was made on the contents of starch and of reducing sugar, the solubility of the starch, the transparency and subsidence of the dextrin. The results showed as follow: the degree of white of the starch was 94.5 and the content of pure starch in the drying root(two years old ) amounted to 30.89%. In this work, the promising future of the development of the starch was predicted.

Key words: Siraitia grosvenorii , Root , Starch , Characterization