Three-dimensional meso-structural finite element models of TiBw/Cu, (TiB2p + TiBw)/Cu and TiB2p /Cu composites were built. Based on the Abaqus uncoupled thermoelectric analysis theory, the quantitative relationship between the microstructure characteristic parameters and the macroscopic electrical conductivity of the composites was revealed by simulation method.The results show that the volume fraction of TiB2 particles is the main factor affecting the electrical conductivity, and the electrical conductivity gradually decreases with the increase of the volume fraction,while the particle size has no significant effect on the electrical conductivity. The volume fraction and the orientation Angle of TiB whisker are the main factors affecting the electrical conductivity. When the whisker orientation Angle is parallel to the current direction, the electrical conductivity is the best, and when the whisker orientation Angle is perpendicular to the current direction, the electrical conductivity is the worst. In the (TiB2p+TiBw)/Cu composites,the volume fraction of the whisker and the whisker orientation Angle are the main factors affecting the electrical conductivity, and the type of the whisker has little effect on the conductivity.This paper provides a new idea and method for the electrical conductivity prediction of (TiB2p + TiBw)/Cu composites, and provides a basis for the hybrid design of the composite with particles and whiskers.