Abstract: In order to increase the coal loading rate of the spiral drum cutting coal and rock, the vibration impact technology is applied to the shearer cutting arm, and a lightweight vibration impact cutting arm with a double-row five-star hydraulic motor as the main driving device is designed using TRIZ theory. The discrete element method is used to analyze the single-factor numerical simulation experiment of the axial vibration frequency of the spiral drum to determine the horizontal range of this factor in the orthogonal experiment; the three factors of "drum speed, axial vibration frequency and working amplitude" are orthogonalized The test analysis shows that three factors affect the coal loading performance. The results show that the coal loading rate of the spiral drum shows a trend of decreasing with the increase of speed, and the coal loading rate of the optimal coal loading performance scheme is 54.56%. The research results provide a reference for the lightweight design of coal mining machinery and the improvement of the coal loading performance of the cutting arm.