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.