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According to the problems of low production efficiency, low digitization and imperfect casting information in the automatic casting process, a casting monitoring system based on configuration technology and PLC technology was designed. MCGS configuration software is used as the development platform of the monitoring system. The running status of the equipment and the processed data collected by PLC under the distributed network are analyzed in depth, and the real-time monitoring of the casting process is realized. The wireless AP client network architecture is used to build the data transmission channel between the underlying mobile devices, which ensures that the system can quickly and stably complete the data acquisition and equipment operation control, and realizes the real-time information display, historical data query and other functions of the casting monitoring system. The system has been applied to the lost foam casting workshop, which greatly improves the informatization degree of the workshop and production efficiency.The positioning of casting station is realized by using radio frequency identification technology (RFID). When the reading and writing times reach 4000-8000, the accuracy rate of RFID is 100%. Taking the casting of 100kg gearbox as an example, the average time consumption is less than 35S, and the accumulated time saving of each pack of molten iron is 180s, which improves the production efficiency.