As we all know, drilling cooling difficulties, it is necessary to use a lot of coolant when drilling. In recent years, in order to improve the cutting of environmental protection, we need a dry machining and MQL (minimum quantity lubrication, mql) cutting technology. Currently, for steel dry, mql hole machining pvd coated tools has been achieved industrial application. However, due to the affinity of the aluminum material is large and tool to achieve aluminum and mql dry drilling is also more difficult, especially in the dry hole machining high silicon aluminum alloys, often because aluminum shavings clogging the drill bit using the ditch leaving shorten life. Even for low silicon aluminum alloys to prevent sticking knife performance dlc coated drills, it is difficult to be competent high silicon aluminum alloy drilling or mql dry drilling.