In this paper,the evolvement rules,action rules and characteristics of bacteria,microzyme and mildew in starter-making and fermentation were elaborated.

• 综述了制曲发酵过程中细菌、酵母菌、霉菌三大类菌群的演替、作用规律及各自的特点。同时从酶角度阐述了细菌的演替、作用规律。