Grounding resistance detector

The utility model provides a grounding resistance detector, which comprises a shell, a display screen, a control key and a function selection switch, and is characterized in that the shell is providedwith a grounding electrode interface, an auxiliary grounding electrode interface, a voltage electrode interface, a current electrode interface and a communication interface; wherein the signal outputmodule, the voltage and current acquisition module, the clock and the power supply are connected with the microprocessor; the signal output module is connected with the current electrode interface; and the voltage and current acquisition module is connected with the voltage electrode interface. The technical scheme is adopted, railway construction or maintenance personnel can conveniently and rapidly detect the grounding resistance of the grounding device. Abnormity can be found and processed in time; meanwhile, the grounding resistance detector has the advantages of being simple in structure, convenient and rapid to