Based on the idea of parametric CNC programming and in accordance with the shape structures and machining processes of aluminum extrusionmodels in some of Foshan area, a parametric CNC programming method for aluminum extrusionmodels and its technical keypoints were presented. The method could be used to mill more than 60 sorts of aluminum extrusionmodels by only one parametric CNC program. So the applicable productivity and management efficiency of the CNC parametric program were improved greatly. The macro packages introduced have obtained excellent effect when it is applied on Mitsubishi systems and FANUC 0i systems, which exhibits a good reference for CNC programming.