In this paper

in view of big error between the capacitive current of the measured resonancegrounding system and the actual one when the maximum displacement voltage method is applied

theshortcoming of the method is found and new improved method is proposed. The issue on the practicalapplication of the method is described through the analysis of the original resonance measurement method.The expression form on the measurement of capacitive current by the maximum displacement voltagemethod is improved through actual analysis and the expression form is integrated into the capacitivecurrent test device. It is shown by the site test result that the modified capacitive current measurementmethod has much higher accuracy.