The basic process of die-casting for lampshade aluminum products, LED street lamp die-casting dies, extrusion and vacuum die-casting dies, and precision die-casting dies is as follows: the liquid metal is first cast at low speed or high speed and filled into the cavity of the die. The die has a movable cavity surface. It is pressurized and forged with the cooling process of the liquid metal, which not only eliminates the shrinkage defects of the blank, but also enables the internal organization of the blank to reach the broken grain in the forged state. The comprehensive mechanical properties of the blank have been significantly improved.