Finite　element　simulation　is　utilized　in　an　aluminum　alloy　2014　butt　weld　with　the　three　kinds　of　welding　processes,　namely　the　filler　wire　Tungsten　Inert　Gas　(TIG)　welding,　the　laser　welding　and　laser-TIG　hybrid　welding.　The　simulated　results　are　in　good　agreement　with　the　weld　cross　sections　for　the　TIG　and　the　laser　welding,　and　basically　in　agreement　with　that　for　the　laser-TG　hybrid　welding　using　the　actual　welding　parameters.　Furthermore,　the　simulated　results　shown　that　the　longitudinal　residual　stresses　after　welding　are　the　largest　for　the　laser　welding　and　the　laser-TIG　hybrid　welding,　the　maximum　of　which　are　approximate　to　300MPa　and　are　1.2　times　of　that　for　the　TIG　welding.　However,　the　residual　stresses　would　be　relatively　decreased　by　backing　molten　with　TIG　welding　and　preheating　before　welding;　the　maximum　longitudinal　residual　stresses　for　the　laser　welding　and　the　laser-TIG　hybrid　welding　could　be　decreased　remarkably　by　about　50%.