The invention provides an IED logic states real-time response capacity detecting method based on physical layer information, and relates to supplement and improvement on a communication port part included in a traditional IED real-time response accuracy detecting method. The IED logic states real-time response capacity detecting method based on physical layer information is based on physical demonstrability and traceability, the correlation mode between data frame simulation/analysis, a physical layer signal of a data frame, a pulse labeling signal of the physical layer signal and the like is adopted, an oscilloscope is combined to display response characteristics of a signal between IED ports, and the accuracy, rapidity, stability and other capacities of IED logic states real-time response can be detected. The IED logic states real-time response capacity detecting method is based on a network communication physical layer and can be used for detecting IEDs meeting IEC61850 or IEC60870-5-103 or other data exchange standards.