As automation is developing faster and faster in today's era, and the level of automation is constantly improving, PLC has become a wide range of applications. The PLC feeding control system is a part of the industrial process. It is controlled by PLC, contactors, sensors, etc. . It is supplemented with switch components, thermal relays and other components and equipment to achieve the full automatic operation of automatic feeding, weighing, and transportation of raw materials. Among them, the operator only needs to control the start and stop buttons, and can press the stop button at any time. The system will stop in the initial state after completing the current process, regardless of the next time caused by the wrong parking time and the stagnation of raw materials. The process is wrong when starting, which reduces the operating requirements and labor intensity of the staff