Abstract: In order to study the influence of different impact energy per mass on the size distribution of ore and rock, a theoretical model of fractal dimension of particle size and impact energy per mass was established based on fractal theory. The crushing tests of anthracite and gangue under different impact energy per mass were carried out with the drop weight impact tester. The results show that the impact energy per mass has little influence on the particle size distribution of anthracite and gangue, and the G-S distribution can well characterize the cumulative distribution of anthracite and gangue under different impact energy per mass. The fractal dimension of particle size increases logarithmically with the increase of impact energy per mass. The experimental results and published data verify the correctness of the theoretical model.