Shenzhen machinery processing technology is the basic industry of the national economy and the equipment industry of the national economy. It undertakes the task of providing technical equipment and production tools for various departments and industries of the national economy. Therefore, it is not only an important part of the national industrialization, but also the material and technical guarantee of the national industrialization. The development level of the machinery industry affects and even determines the technological progress and industrial development level of the relevant industrial sectors to a large extent. According to the statistics of the International Labor Organization, the number of deaths due to work in the machinery manufacturing industry is about 100,000 people every year, and about 1.50 million people lose their ability to work. It can be seen that the number of safety accidents in the machinery industry is frequent and the consequences are serious. 1. The production characteristics of machining In the manufacturing process of mechanical parts, the processing method of removing excess materials to obtain the required parts or work in progress is called machining, and the processing method of obtaining the required parts or blanks by casting, forging, welding, etc. is called forming process. The characteristics of the machining industry itself are: 1.1 Types of jobs Multi-machining jobs include forgers, lathes, boring, milling, planers, pluggers, grinders, fitters, drills, carpentry, stamping, blanking, riveting, sheet metal workers, etc. Each job has its own operating characteristics and operating risks. Different types and sizes of enterprises involve different types of operations