<p>Trait mindfulness refers to an individual’s ability to maintain present moment awareness in a nonjudgmental manner. At a micro level, trait mindfulness is composed of psychological processes that form sequentially. Although previous studies have examined the network structure of trait mindfulness, few have focused on the directionality of each mindfulness process from an item-level perspective. Based on the theoretical framework of mindfulness mechanisms, this study used Bayesian network analysis to examine the directional relationships of each trait mindfulness process involving 724 young adults (<i>M</i>_<i>age</i> = 19.27 years, <i>SD</i> = 1.06) from China. The results were visualized as directed acyclic graphs, demonstrating the formation of mindfulness processes from foundational processes to adaptive processes. The foundational process “Focusing on present” within the “Present Focus” dimension triggered a foundational process in each of the other three dimensions: “Track awareness” (Awareness), “Accept thoughts and feelings” (Acceptance), and “Distraction/Concentration” (Attention). Adaptive mindfulness processes were located in the lower part of the network, such as “Emotional tolerance” (Acceptance), “Future preoccupation” (Present Focus). These mindfulness processes were directed to “Nonjudgmental thoughts”. A microscopic level investigation deepens the understanding of the internal structure of trait mindfulness and offers insights for designing effective mindfulness interventions.</p>