Under the general trend of my country’s manufacturing industry upgrading and dual circulation, green manufacturing, intelligent manufacturing and service-oriented manufacturing have put forward higher requirements for heat treatment technology and equipment. As an advanced process in the field of heat treatment production technology, vacuum heat treatment has the advantages of high quality, low consumption, no pollution and high efficiency. With the rapid development of science and technology and the urgent needs of modern production, vacuum heat treatment technology is more and more widely used in China.