Abstract: With the application of digital technology, virtual debugging technology plays a vital role in the debugging of production lines. This paper uses Siemens PDPS simulation software and Portal software, along with the PLCSIM Advanced simulator, to conduct joint debugging of a self-designed double-layer circulating roller table in a certain process of the power production line. It performs virtual verification of the S7-1500 control program and completes the logical verification of PLC and HMI programs before equipment installation and commissioning. The technology realizes the analysis of motor servo messages, avoids problems of control logic and proximity sensor layout in the field debugging process in advance, improves the maximum buffer of the pallet on the roller table, and offlines the completed program to the field equipment. This approach enhances equipment debugging efficiency and significantly shortens the project debugging period.