Abstract: The investigation state on the presence and evolution of ³He in metal tritide, the possible approach to slow down the release of ³He from tritides and the effect of helium aging on the metal tritedes were reviewed in the present paper. The comparison of ³He aging behaviors of several metal tritides was carried out, and the development trend of the evolution of helium in metal tritides was also reviewed. It was also summarized briefly the results of our group in the development of helium effects in metal tritides.