Charging pile is the most important equipment of electric vehicle power system. According to the demand of electric vehicle for charging equipment, the article uses PLC as the core controller to introduce the design of electric vehicle AC charging pile control system. The hardware circuit includes the design of the main control module PLC, the touch screen, the power calculation module, the printing module and the like; the software system includes the communication design of the PLC main program design, the touch screen, the IC card and the like, and enables communication between the modules through communication. The data transmission is smoothly realized, and various data collection in the charging process is completed in real time; the electrical part of the whole system is also provided with double protection for the purpose of safe operation.