Automation is industrial automatic control, which is the automatic control system of chemical enterprises. Used to be called musical instrument major. Everyone says that instruments are the eyes of chemical production. In fact, modern automatic control system is not only the eyes of industrial production, but also the brain of industrial production. With the development of electronic technology, automatic control system products have developed from pneumatic instruments and electric instruments to distributed systems, integrating single-loop control into the control of all control systems of the whole production device. Operating in the central control room can control the valves at the site without leaving home, and control the temperature, pressure, flow or liquid level in the process equipment in time to achieve stable and rapid control effect. If there is a problem in the automatic control system, it will bring great harm to the process production, especially to the quality, output and even safety of the process products. The safety system involved in instrument interlocking is extremely important to the safety of chemical process production, and a misoperation may cause an explosion in the whole plant. On-line analytical instruments are of great significance to the quality of scientific and technological products, especially the quality of products. With the development of DCS control technology, the control system has also made great progress in emergency shutdown, especially the safety control of the core units in the factory, which can ensure the safe production of the factory.