In order to make full use of the land resources of the high-voltage transmission line protection area and alleviate the problem of the shortage of photovoltaic land, the electromagnetic environment of the photovoltaic power station in the 220kV high-voltage corridor is analyzed in this paper, considering the extreme case of lightning strike. By analyzing the possible influencing factors, this paper simulates the photovoltaic metal bracket with the injection of lightning into nearby the tower grounding system. In order to better simulate the environment of the metal bracket, this paper considers the cement foundation of the metal bracket. The calculation results of the thermal stability of the bracket material, surface potential rise, step voltage and contact voltage are obtains under different combinations of the cement and soil resistivity and other parameters. The research shows that the steel tube with inner diameter 5 and outer diameter 10 can meet the requirements of thermal stability. The resistivity of the cement foundation will not affect the step voltage and contact voltage. And under the simulated situation in this paper, when the soil resistivity is less than or equal to 3000 \(\Omega {\text{m}}\) , the step voltage will not pose a threat to people. However, when the soil resistivity is greater than 1000 \(\Omega {\text{m}}\) , attention should be paid to the harm of contact voltage.