In order to ensure the safe and reliable operation of the automatic production system, a control system platform is constructed based on EtherCAT industrial bus and Beckhoff controller. It realizes the key technology of 5-channel high precision servo pressure control and high speed safe medicine weighing. The control system has completed the production process control of the whole line, and the production line based on the system has been successfully implemented. The results show that the platform meets the requirements of the system for control accuracy, rapid response, safety and reliability, and the application effect is good.