Abstract: The 12% SiCp/2024Al (in volume fraction) composite was prepared by mixing the element powder in a 3-D high-efficiency mixer. The effect of mixing process parameters on the spatial distribution of SiC particles were investigated. The experimental results indicated that the ball/charge weight ratio, mixing time and particle size of SiC affect greatly the distribution of SiC in the matrix of the composite. When the ratio is 1:2, it is difficult to achieve the uniform distribution of SiC particles because of low energy input. When the ratio is 5:1, the distribution uniformity of SiC particles is improved gradually with mixing time but cannot be improved much longer at a certain moment. When the ratio is 5:1 with the mixing time 20h, the 3.5μm SiC particles are the best of uniform distribution in matrix, whereas the 0.8μm SiC particles may form conglomerates in matrix.