Printed circuit board (PCB) is sensitive to electrostatic discharge, which affects the normal use of electronic product. In order to obtain the energy coupling law of electrostatic discharge (ESD) with PCB, ESD test was applied to the simplified PCB. The effect of the discharge position, characteristics of the PCB trace and discharge voltage on the coupling of ESD electromagnetic field was studied by measuring the coupling voltage on the PCB trace. The test results show that the discharge position, trace width, length and termination resistor will affect the magnitude and trend of coupling voltage and there is a good linear relationship between the discharge voltage and the coupling voltage. Based on a full wave model that is also established in compilation simulation technology microwave studio, it further nstrates the test results from the standpoint of simulation. The research results have certain guiding significance for PCB electromagnetic compatibility design.