Aiming at the key technical problems of cement mill which are cement ingredients and cement load control, the ball mill is designed as the design object, in which, S7200 PLC is used as the main control, Siemens MM420 converter is used as a speed control device, and Siemens WinCC V7 is used as a development tool. A PLCbased cement mill pulverizer control system is designed to achieve the monitor of the cement mill parameter acquisition, such as temperature, pressure and speed, process control and quality control in the production process.The results of the practice show that the PLCbased cement mill control system not only can intuitively and clearly show ,control and monitor all aspects of the production process of the pulverizer and control or monitor , but also can check the fault to alarm.It is of great practical significance for improving the working environment of workers, and improving the level of cement batching and the longterm safe operation of cement grinding machine.