The distribution of theβ-phase crystals of polypropylene (PP) in different zones of compression and injection moldings molded from PP-based dynamically vulcanized thermoplastic elastomer (TPV) in the presence of a β-nucleating agent (β-NA) was investigated. The influence of shear and cooling conditions and the addition of -NA on the development of -phase was examined and discussed based on the one-dimensional heat conduction behaviors with phase change. A hierarchical distribution of -phase was observed in both compression- and injection-molded TPV/β-NA specimens. For the compression-molded TPV/β-NA specimens, the hierarchical distribution of -phase induced by -NA is dominated by the cooling conditions. For the injection-molded TPV/β-NA specimens, the occurrence of -phase is also mainly induced by the addition of β-NA; the effect of shear on the relative content of -phase can hardly be observed and the cooling conditions control the hierarchical distribution of β-phase. Both in compression and injection-molded TPV/β-NA specimens, the relative content of β-phase increases from the skin to the core zones, owing to the cooling rate decreasing from the skin to the core zones. Copyright © Taylor & Francis Group, LLC.