By　research　on　the　substitution　of　the　traditional　punching　and　trimming　die　with　the　laser　cutting,　substitution　of　the　resistance　spot　welding　in　the　general　assembly　of　the　car　body　with　laser　welding,　and　laser　welding　of　multifarious　thickness　overlay　of　car,　the　characteristics　of　laser　manufacturing　technology　in　automobile　industry　are　displayed.　The　roll　matrix　are　fabricated　by　laser　cladding.　Compared　the　traditional　roller　technological　process　of　sintering,　the　short　technological　process　of　laser　manufacturing　not　only　increases　productivity　and　shortens　technological　process,　but　also　reduces　the　cost　and　saves　the　energy.　This　technology　will　have　wide　application　in　industrial　process.