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The influence of a metal conductor in soil on ground resistance is studied by setting up the experimental ground grid. By embedding different shape metal conductors, changing the buried depth of metal conductors and the relative distance from the test grounding grid, the grounding resistance of the test grounding grid was measured at different points. Analysis of test data shows that the buried metal conductor leads to the smaller measured value of grounding resistance, among which the sguareshaped metal conductor has the greatest influence on the measured value of grounding resistance, and the lineshaped metal conductor has the least influence on the measured value. When the metal conductor is located outside the test voltage pole, the influence on the measured value of grounding resistance is greater than that on the inside. When the metal conductor is located inside the test voltage pole, the measured value of grounding resistance at different test points is quite different. When the metal conductor is located outside the test voltage pole, the measured value of grounding resistance at each point has little difference. The buried depth of a metal conductor has no obvious influence on the measured value of grounding resistance.