Several sealing-in technologies about nonmetal materials such as quartz glass etc. and metal materials are introduced. The process used in the important sealing-in process is preliminarily analyzed, merits and demerits of various kinds of sealing-in modes are listed and the new process of calotte sealing-in mode and improvement method of molybdenum foil sealing-in mode are introduced. So on the basis of present technology, the sealing-in technology of light source is improved and relative reliability specifications of products such as vacuum-tightness, heat stability and mechanism strength etc. and operation lifetime are improved gradually.