Abstract: In order to study the compaction behavior of Cu-W powder particles, Java programming language was used to construct a mathematical model of randomly distributed non-equal diameter Cu-W three-dimensional particles, and the generated spherical center coordinates were imported into the finite element analysis software Marc to construct a three-dimensional model of compact ball-piled loose powder particles. Numerical simulation of powder particles distribution,deformation and nodal flow law in the process of compaction was carried out by Marc software. The results show that during the compression deformation process, the powder particles in the mold cavity rotate in a spiral shape in space. The larger the particles are, the more significant the degree of deformation is. The soft Cu particles form concave arcs and cylindrical arcs at the contact points, and the nodal trajectory has a tendency to rotate from top to bottom, from the center to the surrounding. The smaller the internal friction coefficient is, the more suppressed higher density is.