Grounding resistance is an important parameter to measure the stability of power system. If the grounding system is buried in the soil with poor contact with the electrode, the resistance reduction effect of simple graphite grounding device in complex soil environment is general, which is difficult to meet the engineering requirements. conditions. Based on the principle of reducing resistance of grounding device, this paper puts forward a method of reducing resistance of grounding cloth to increase the area of stray current, and designs a grounding scheme of grounding device plus grounding cloth. Firstly, the simulation analysis is carried out, and the grounding experiment of graphite grounding device with grounding cloth is carried out in the simulation test platform. Several factors such as the location of grounding cloth, the depth of embedding and the amplitude of impulse current are mainly measured. Through the comparison of simulation test and simulation, the change of grounding resistance is measured, the influence law of various factors on grounding resistance is summarized and analyzed, and the auxiliary current dispersion scheme of using grounding cloth to reduce grounding resistance is proposed, which provides reference for reducing grounding resistance.