Abstract: Aiming at the problem of poor particle size characteristics of traditional medium grinding products, the influence of different medium shapes (sphere, Leroy tetrahedron, and cylinder) on the crushing particle size characteristics of the material layer was studied. The impact effect of different medium shapes at different heights (0.5 m, 1.0 m, 1.5 m, and 2.0 m) on the material bed was simulated by using drop weight tester. The results showed that the fitting coefficients of the equation fitted by Weibull distribution were in the range of 0.96~0.99, which proved that Weibull distribution function was reliable and feasible to describe the particle size distribution law of impact crushing of copper ore. The results showed that it was reliable and feasible to use Weibull distribution function to describe the particle size distribution law of impact crushing of copper ore; the results showed that the impact velocity had little effect on the particle size distribution of impact crushing of copper ore, and the crushing characteristic index of 2 m height (6.29 m/s) Leroy tetrahedral medium was 0.22 and 0.18 higher than that of steel ball and steel segment, respectively. Compared with steel ball and steel segment, the yields of +0.15 mm, −0.074 +0.038 mm, −0.074 mm and−0.01 mm were decreased by 3.14 and 1.85 percentage points, 5.86 and 2.26 percentage points, 0.4 and 1.41 percentage points, 4.52 and 2.64 percentage points, respectively. It was verified that the shape of Leroy tetrahedron medium can effectively improve the particle size characteristics of the material layer.