In order to solve the practical problems of initiating explosive device manufacturing process, a servo motor control system was designed. Through analyzing the structure model of charging equipment, the PLC-driver-servo motor control system was designed by the PROFINET bus. Then, the specific implementation process of the control system was introduced, and the fuzzy control rules were determined according to the fuzzy control method. The analysis results show that the system can realize automatic charging and dumping residual powder of the charging machine smoothly and quickly, it eliminates the hidden danger of manuals operation, and improves the intrinsic safety of the production line.