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L/(m2?h),、透射比為90.5%。Moderate temperature α-amylase was used during the extrusion and liquefaction of degermed corn. The method of the quadratic orthogonal rotating combination design of five factors (barrel temperature, moderate temperature α-amylase amount used in the extrusion, moderate temperature α-amylase amount used in liquefaction, liquefaction time, amyloglucosidase amount used in saccharifaction) and five levels was applied. The influence of extrusion and producing glucose syrup system parameters on DE value, filtration speed and transparence were studied. The optimized system parameters of extrusion and producing glucose syrup were used to produce glucose syrup, and DE value was 96.8%, filtration speed was 483.6 L/(m2?h), transparence was 94.0%, the results of control test were: DE value was 72.5%, filtration speed 20.2 L/(m2?h), transparence 90.5%.