Vacuum drying oven is used for drying and heating test in vacuum condition of objects in scientific research units, specialty universities, industrial and mining enterprises’s laboratories together with production field, etc. Drying goods in vacuum condition has a lot of advantages as follows: 1.Can reduce the drying temperature. 2.Avoid some of the items being oxidated when heating. 3.Avoid some biologic cells being killed by the air when heating. 4.No dust damage.