In this paper,five methods including precipitation separation,etc.were employed to isolate amylose from maize high- amylose starch and normal starch.Differences in extraction efficiency and quality were compared.The results showed that there is no obvious difference in the average extraction rate of five extraction methods between maize high- amylose starch and normal starch.Distillation dispersion method and DMSO salting out method had the highest extraction rate(33.22%and 34.67%),while high-rpm precipitat...