With the continuous development of manufacturing technology, the machining center has increasingly widely used in automotive parts machining. Based on analyzing the structural characteristics and technical requirements of car alloy pump, the machining process of the hole series on automobile pump parts was deeply researched. The test of the cutting technology was conducted on condition of same process criteria and similar quantity production. The methods and process of processing technology for hole series on the pump were optimized. And a reasonable processing scheme for hole series was established. This research results has widely popularizing and application value in process of quantity production of aluminum boxtype parts, will improve the quality, efficiency, and lower the cost.