Aluminum alloy die-casting product manufacturing process and application thereof

The invention relates to the field of aluminum alloy casting, and provides an aluminum alloy die-casting product manufacturing process. The aluminum alloy die-casting product manufacturing process atleast comprises the following steps of: (1) melting an aluminum alloy to obtain a melt; (2) casting the melt to obtain a first casting; (3) carrying out solid solution heat treatment on the first casting to obtain a second casting; (4) carrying out de-burring and surface shot blasting treatment on the second casting to obtain a third casting; and (5) cleaning the third casting, so that the aluminum alloy die-casting product is obtained. The surface shot blasting treatment is carried out in a shot blasting machine; a metal abrasive used in the surface shot blasting treatment process is selectedfrom at least one of ball shots and cut shots; and the content of chromium in the metal abrasive is 10%-25%. The product obtained by the preparation process disclosed by the invention not only can effectively reduce air holes