Abstract: The School of Automation Engineering designed a supporting experimental circuit board and employed software simulation and hardware circuit board verification method to design and complete the circuit fault diagnosis of the five experiments. The aim is to help students better study the basics of circuit fault diagnosis technology and master basic methods such as fault table, Boolean difference, fault dictionary and other methods, and understand the schematic capture software and circuit diagram maker OrCAD Capture and the simulation software OrCAD Pspice. Such experimental teaching will help students understand the theories and simulation methods of actual circuit fault diagnosis.