Vacuum degree detection method for vacuum die-casting die

The invention discloses a vacuum degree detection method for a vacuum die-casting die. The method is characterized by comprising the following steps that a die cavity is vacuumized through a vacuum pump, and the pump capacity of the vacuum pump is obtained; air pressure in the die cavity is obtained in real time through an air pressure detection sensor; the leakage rate of the die cavity is obtained through calculation according to a formula, wherein the formula is that T=V/S*ln(P2/P1). According to the vacuum degree detection method for the vacuum die-casting die, vacuumizing operation simulating a site is carried out on the die cavity, the curve line of air pressure changes and time is recorded, the leakage amount of the die cavity is calculated through a theory, whether the sealing situation of the die reaches production demands can be assessed before production is carried out, the situation that the die is returned to a factory for re-inspection and repair after the production is carried out is avoided, and the production working efficiency is improved effectively.