In view of the fact that the traditional powder pressure control technology is difficult to control the pressure in real time, a servo pressure control system based on PROFINET bus is designed, and the torque of the servo motor is fed back to the control system through PROFINET bus in real time. In the process of pressing charge, the control system controls the large torque of the servo motor in real time through the servo driver, and compares the torque feed back by the servo driver with the limit value of torque to judge whether the trigger torque exceeds the limit alarm and stops the powder pressing. The results show that the system can greatly improve the accuracy and safety of the pressing process.