Abstract: In this paper, three problems of joint softening, porosity and crack in 2195 Al-Li alloy during welding were discussed. The research status of 2195 Al-Li alloys in TIG welding, MIG welding, friction stir welding, laser welding and electron beam welding were reviewed. In particular, the influence of welding technology on microstructure and mechanical properties of welded joints was introduced. Furthermore, the development trend of 2195 Al-Li alloy welding technology was prospected.