Vacuum switch (also known as vacuum arc tube) is the corecomponent in the power switch of the power industry of high and mediumvoltage power transmission system. Compared with other switches (oilswitch, air switch, magnetic switch blowing, SF6 switch, low oil switch),vacuum switch has characteristics of long life, stable and high reliaility，no pollution, no noise, no explosion and fire hazard . High- performance vacuum switch tube shell with good seal strength, good air-tightness will be extended to the usage of magnetron components, microwave tubes ,X-ray tubes, power electronics applications, to meet the current market for high quality vacuum switch tube and the urgent need of replacing imported products.