The utility model discloses a be used for portable impulse current generator of impulse grounding resistance measuring, including main circuit, control circuit, the main circuit is used for producing impulse current to be connected with control circuit, control circuit is used for controlling the main circuit and carries out pulsed discharge, and the main circuit tail end is connected to the current injection utmost point and the backward flow utmost point of grounding body respectively, and the injector is connected to the pulse analyser, and the pulse analyser measuring junction is connected to oscilloscope, still including concatenating the luo shi coil at the backward flow utmost point, luoshi winding connection to oscilloscope. The utility model discloses obtaining current rush to the grounding body and measuring, the impulse voltage and the current waveform that record really will definitely lean on, and equipment is small, light in weight, and transportation and convenient assembling, experimentation cost is low, and easy operation is convenient, and greatly reduced tests dangerously to charging voltage is the highest can to reach 50kV, and the impulse current amplitude is the highest can to reach 3kA.