Aluminum alloy materials were used widely in the machine manufacturing for its excellent perfor-mance.When the aluminum alloy parts are machined in the numerical control machine manufacturing center，it will have the advantages of high efficiency and high precision relative to the previous ordinary machine tools.For the structure features of all kinds of numerical control machines，their application characteristics in vertical ma-chine，horizontal machine and while alternating vertical machine or horizontal machines as well as in planer milling center were put forward.According to the machining features and requirements for aluminum alloy parts，the application of numerical control milling machining arts and crafts such as the choice of programmed cutting parameters，the common structure features numerical control program were introduced.