To explore the optimal conditions of corn beverage from extruded corn,the pretreatment technology,and optimization of the saccharification reaction temperature,pH,and the ratio of material to water were determined by response surface methodology.The results showed that the extruding treatment shortened the corn beverage processing,lower the energy consumption and increased the production efficiency.The optimal conditions were: reaction temperature 60℃,pH value 4.6,the ratio of material to water 6 mL/g.Under the above condition,the ultimate reduced sugar content of extruded corn reached to 0.58 g/g.