The control system is designed to establish a modern coal preparation plant which is based on science and efficient. In the control system, we adopt the German Siemens high-end products S7-400 series PLC as the control host of field control and acquisition system, and we are quite familiar with the technology, it has a very good application in many large and medium-sized coal preparation plants in domestic. The advanced nature, reliability has been recognized. And Siemens series PLC has a high market share in foreign and domestic market, which has abundant spare parts. Through the establishment of the control system to lay a foundation for establishing a fuzzy control coal preparation plant based on practical knowledge in the future. And integrated into the density subsystem, industrial television subsystem, and computer information management subsystem, which can improve the automation level of centralized control system.