[en] 7 series high strength aluminum alloy under high temperature and without protective easy to rust, now 7 series for high strength aluminum alloy work piece is dried after rinsing water way, compressed air after water hot air drying cutting surface, the drying after the work piece can meet the requirements of the assembly of the late, but also in the dry mass artifacts appear many instability, the main reason is that aluminium alloy work piece for a long time at high temperature, high oxygen environment. In order to solve the problem of high temperature and high oxygen, the vacuum drying process was developed for experimental verification. The vacuum drying process was optimized through the experiment, and the surface and inner cleanness of the blind hole of the work piece after vacuum drying and hot air drying were compared. The stability of the vacuum drying process was verified by batch test. (authors)