The utility model discloses an electric test ground connection early -warning control device includes the box at least, its characterized in that, box include earthing terminal, subtest end, control module, power supply output module, earth -leakage protector, display screen, rotatory mouse, knife switch, power input end and a plurality of pilot lamp, power supply output module include a pluralityof terminal formula power supply output unit and a plurality of socket formula power output end, language module number including volume knob, volume knob locates the box surface, the utility model discloses still be equipped with outside extension input, but provide one kind have voice prompt, be equipped with the bonding end, safe swift, the electric test ground connection early -warning control device that can outsidely expand, can support multiple output mode and measurement grounding resistance of operation.