Laser cladding is the use of a laser beam to melt orange powder melting material attached to the base material to form a new composite material layer. When the laser power density in the 104 ~ 106W / C when the order of magnitude range, the material surface melting will occur, which is the power density required for cladding. A typical cladding materials Ag, Ni, Cu, stainless steel, nickel-based alloys and diamond-based alloys, and even nitrides and carbides, ceramic materials. Wuhan Iron and Steel Company blooming plant 280 t / m torque of large herringbone gear. This kind ofgreen laser pointercan give out the green ray. Repair using laser cladding technique, cost only 50% of original value, l-5-fold increase service life, repair, running in good condition after 210 laser surface alloying to change both the structure of the surface layer, but also change the composition of the surface, greatly improve the wear resistance of materials, corrosion resistance and hardness. Study [3], SiC, WC, TiC powder injection into the laser molten pool of steel, the hardness of the formation of the cladding, respectively, HV 1 700, HV 1 100 and HV 1 800. In the tool steel substrate by laser alloying TiB2 and B4C layer, so that wear resistance of steel capacity than the untreated steel increased by 10 times. Laser is a clean green energy, high efficiency, low cost, processing quality and reliable, with good economic and social benefits. World, especially in industrial countries, are actively promoting the use of laser processing technology. According to statistics, in 1998 the world of laser technology industry turnover up 64.7 billion U.S. dollars, China's laser industry about $ 100 million. The green raygreen laser pointercan be bought at the wholesale price. Scale in the laser industry in China is far behind the world level of the same industry, which also does not match our level of research, the main problem is the practical application, particularly the manufacturing level, there is a gap. Laser beam quality of laser technology is the key to the decision, the production of laser beam quality is not clear to the Indian set. In addition, laser technology is a multi-disciplinary, multi-disciplinary cross, as well as related technical cooperation, convergence and other issues, but also affect their application. Attention to beam quality, increase the level of laser manufacturing, in-depth applied research, in order to win the market, in order to promote application and development of laser technology. As China's machinery manufacturing, automobile manufacturing high-volume, high efficiency, high-quality production line requirements and development, increasing levels of quality of personnel, the use of laser technology to improve cost, lower production costs, will make the application of laser technology as generally the same computer. The free shipping can be provided for the green rayGreen laser pointer. Laser processing goal is to obtain the optimal process parameters, such as material removal rate, surface quality and dimensional accuracy, and thus more economical to produce high quality parts. Can be used to generate surface ablation and expansion of these two parameters to represent the laser processing, shown in Figure 1, the size and surface ablation velocity determines the material removal rate, ablation of the surface geometry of the surface determines the quality and size accuracy. The typical laser processing when the state variable drilling hole depth, the depth of cut when cutting, carving when taper [1, 4, 5]. Currently, most of the laser processing is also dependent on time-consuming "trial and error" to be only suitable for a particular purpose of the process parameters. The green raygreen laser pointeris very suitable to the class teaching for the teacher. This method can not be processed in the dynamic changes, we can not get the best process parameters. To overcome these shortcomings, the introduction of the laser processing closed-loop control techniques [2, 3], real-time sensors detect certain parameters (such as current or voltage) changes, and converted into the actual process variables, such as the depth of cut or taper , and printed more accurate given value, using the difference as the control volume, and then automatically adjust the laser operating parameters, such as the resonant current or beam scanning / workpiece velocity to ensure accuracy, and process parameters to achieve the best. The green raygreen laser pointerwill play an important role in the teaching process.