 This paper proposes a new set of modeling procedures for discrete element models, DEMs, of granular materials using the hexagonal closed, packed, HCP, structure instead of the widely used simple cubic, centered, SCC, structure. These procedures are based on a set of equations derived from the basic configuration and mechanism of discrete element theory. Furthermore, these procedures can be used to calculate the microparameters of the DEM models, which are then verified by performing simple stiffness slash bond tests and complete indirect tensile, IDT, tests of asphalt mixture specimens. The results show that the new approach to determining model microparameters based on mechanical calculations is reliable and that the HCP structure DEM models have advantages in simulating shear failure and Poisson's ratio. This article was authored by Xiaodong Zhou, Dongxiao Qin, Dongdong Gu, and others.