In order to reduce the disaster caused by the instability of the tower caused by the rolling stone impact, this article will use Rocfall software to build a model slope, simulate the rolling trajectory, bounce height, and impact kinetic energy, and then combine the Hertzian collision theory with energy conservation theorem and the Japanese formula estimate the maximum impact force of a rolling stone when it hits the tower, in order to evaluate the danger of the rolling stone to the tower. The calculation results show that the magnitude of the rolling stone impact force on the legs of the tower is approximately 3.6×10⁶∼2.55×10⁷Pa, which is obviously beyond the range that the tower can bear. At the same time, the best control position of the slope is selected by the simulation results. The bottom 25∼75 m is more suitable. It provides a theoretical basis for the study of the protective device of the iron tower and is conducive to the safe and stable operation of the iron tower.