Abstract: Here was summarized the current status of electron beam technology at home and abroad, including the latest developments in welding and additive manufacturing, and was introducesd the progress application of electron beam welding in the field of domestic ship building, including the electron beam welding of large thickness titanium alloy, complex precision welding, electron beam surfi-sculpt and electron beam fuse rapid additive manufacturing. Then the application and development prospect of electron beam welding technology in domestic shipbuilding field were prospected.