0 IntroductionIt is known that every solid material can dissolve andabsorb some gases in the atmosphere.When these materialsare put into a vacuum chamber(as an environment),they willgive off the adsorbed or dissolved gases and vapors,which iscalled outgassing[1].Outgassing in the ultra-high vacuumsystem includes outgassing of ultra-high vacuum valve facility andoutgassing of testing products,and the latter of which isanalyzed in this paper.Many testing products of spacecraft,such as drivingframework