The sticking of castings to die has a very close relation wan neat. Therefore casting temperature is the most important factor with regard to sticking. As the casting temperature becomes higher, the sticking grows stronger. However, temperature of die and casting pressure do not substantially influence the sticking. The thicker the gate of die is, the weaker the sticking becomes. Therefore, in order to avoid the sticking of castings to die, we must enlarge the gate of die.