An electronic management display system of grounding status in substation is studied， which is to prevent two kinds of mal-operation of closing grounding-switch and articulating earth-line， sending the electricity by taking electricity with grounding switch and closing earth line. The construction， technical features， software function and application results of this system are introduced. The whole system is installed in the supervision center of substation， and consists of three parts of grounding sign， grounding status management card and computer management software. The system make it easy for the substation operator and maintenance personnel to control grounding status of field， and to prevent the occurrence of security incidents of living mal-operation.