Internal highpressure forming process on both sides of the hydraulic cylinder position synchronization control problem is one of the key technologies of internal high pressure forming control system.The simulation and experimental study was conducted in accordance with the multivariate coordinated control simulation test platform which was independently developed.The mathematical model was established on the side of cylinder position control system.By using the comprehensive control mode of "synchronous + masterslave",the PID controller simulation model of this system was built in the Simulink.The simulation results show the feasibility of the PID controller experiment.On this basis,the single cylinder PID position control experiment and both sides of cylinder position synchronous PID control experiment were conducted with S7300 PLC as the main controller and WinCC as the configuration software.The experimental results show that on both sides of the cylinder position synchronization control system based on S7300 PLC and PID controller,has a high accuracy of the synchronization control and strong antiinterference ability,which can meet the control requirements of the system and provide reference for the practical application of internal highpressure forming control system in this way.