Expressive arts therapy (EAT) is a significant means of trauma intervention, which has beckoned much attention. As an EAT, mandalas have a unique advantage in trauma intervention. The creation is a process of personal healing, specifically manifested in the fact that the individual's internal trauma experience can be externalized through metaphoric means such as graphics, lines, sizes, and colors, to alleviate the discomfort directly caused by trauma exposure. Moreover, the Mandala is committed to the psychosomatic healing and integration of individuals from the beginning to the end, and it adopts symbolic methods to stimulate the creator's introspection and self-observation to actively facilitate the restoration of the relationship, which is highly consistent with the characteristics of police trauma. Embracing mandalas in police trauma intervention can provide theoretical support and empirical guidance for the latter, thereby enhancing their professional sense of belonging and happiness.