Surface mount technology (SMT), as one of the important core technologies in the electronics industry, has the advantages of high component installation density, small size of electronic products, light weight, high reliability, strong seismic ability, good high-frequency characteristics, easy to achieve automation and improve production efficiency, and can effectively reduce costs. Whether it is daily consumer electronics, or applied in aerospace, communications engineering and other cutting-edge technology electronic products, the application of SMT will make a major change in the product. Many large enterprises, such as TV sets, computers, optoelectronic devices and other manufacturers, need to surface mount the relevant electronic components