The die casting die is a method of casting liquid die forging, a process completed on a special die casting machine. Its basic process is: first cavity liquid metal in low speed or high speed casting filling into the mold, mold cavity surface activity, it is with the metal liquid cooling process pressure forging, can eliminate the blank of shrinkage cavity shrinkage, also make the blank internal organization of forging state of crushing grain. The comprehensive mechanical properties of the blank have been greatly improved.