Three-dimensional visualization is a new research field in the information processing, and VTK is a visualization toolkits with strong functions. Due to the fact that most two-dimensional microfabric models of coarse aggregate are not accurate, the three-dimensional model is needed. This paper lay its focus on the theoretical model of three-dimensional visualization and the visualization technology based on VTK to study the coarse aggregate microfabric. The experimental reconstruction results show that the particles morphology and pore space are clear, and can describe the morphological features of coarse aggregate microfabric accurately.