Vacuum electromagnetic valve

The utility model provides a vacuum electromagnetic valve, which comprises a first core shaft, a second core shaft, a magnetizable plug, an elastic component and a loop component. The contacting part between the second core shaft and the plug provides the structure that the contact area of the second core shaft and the plug is smaller than the second core shaft radial sectional area, and also smaller than radial sectional area of the plug; the structure can be achieved by designing the end of the second core shaft faced to the plug as a hollow truncated cone structure, and designing the end that the plug faces to the second core shaft as a hollow truncated cone structure or designing the form of the contacting between the second core shaft and plug as a line contacting form. The structure can reduce the contact area that the second core shaft and the plug contact with each other, and increase the pressure on the unit area of the contact area; thereby, the seal effect that the plug seals the second core shaft can be improved. The third core shaft can also be provided; and the contact part of the third core shaft and the plug can also adopt the structure of the contact part of the second core shaft and the plug.