The effects of high energy ball milling and general mixing on the spatial distribution of reinforcers of the SiC p(B 4C p)/Al composites have been investigated systematically by means of qualitative and quantitative methods. High energy ball milling, which leads to the dispersed homogeneous distribution of reinforcers in the matrix, is the most effective method for obtaining homogeneous distribution of reinforcers. There are many clusters of reinforcers in the composites fabricated by general mixing. The segregation degree of reinforcers is related to mixing medium and mixing time. The most uniform distribution of reinforcers has been obtained through long time dry blending, and for wet mixing distribution of reinforcers can be also improved when increasing the mixing time.