Aiming at the disadvantages of troublesome construction and maintenance, difficult expansion of physical I/O hardware connection between loading and unloading unit equipment, an integration scheme of loading and unloading system based on industrial ethernet was constructed. The data communication between Rockwell PAC, FANUC CNC machine tools and FANUC robot equipment based on EtherNet/IP industrial ethernet was focused on, and the product processing flow, robot fixture quick change function and equipment loading and unloading program were analyzed. Through the built experimental platform, it is verified the correctness of the designed scheme, the software has stable performance and rich functions. The results show that: the loading and unloading unit based on Industrial Ethernet has the advantages of simple hardware connection, convenient maintenance, rich communication data and flexible function development.