The electric system plays a role as a bridge in the four-column hydraulic machine control system. On the one hand, it converts the commands and data sent by the upper computer and the PLC into corresponding electric control signals, and controls the hydraulic actuators in the hydraulic system of the four-column hydraulic press to complete each Direct operation of hydraulic components. On the other hand, it feeds back the status information collected from the hydraulic system of the four-column hydraulic machine back to the upper computer to facilitate the closing control of the upper computer. At the same time, the four-column hydraulic machine electrical system has internal switch self-locking and closed-loop control to improve control robustness and transient response capability.