Abstract: a-Amylase inhibitor is a kind of organic compounds.It can be potentially use as medicines of diabetes owing to inhibiting glucose from being absorbed in the digestive tracts,and its gene can be used as insect-resistant genes in crops breeding.A comprehensive review was made on the general development,categories,characteristics and application of a-amylase inhibitors in this paper and the prospect of application in agriculture and medicine was expected in advance.

Key words: A-Amylase inhibitor Characteristic Medicine , Application