The vacuum discharge pump is a device that can work in high temperature and high vacuum environments. It is usually used in short-path distillation, vacuum distillation, molecular distillation and other processes. Due to the strict requirements of the molecular distillation process, the vacuum discharge pump has very high sealing reliability requirements. For this reason, a variety of sealing forms are provided, including mechanical seals and magnetic seals, to ensure that good sealing performance can be maintained at high temperatures. The vacuum discharge pump also has good corrosion resistance, high temperature resistance and the ability to maintain high vacuum to adapt to the transportation needs of different chemicals. Vacuum discharge pumps are mainly used in the distillation process of chemical, pharmaceutical and other industries, especially when high vacuum conditions are required for material transfer and discharge.