The primary objective of this research was to devise an ARC-centric parent-child play therapy program aimed at the alleviation of symptoms associated with childhood attachment trauma, and to subsequently substantiate its effectiveness. The program's developmental stages were thoughtfully structured into planning, design, and drafting phases, premised on the program development. To verify the effectiveness of the final ARC-centered Parent-Child Play Therapy program, 14 pairs of parents and children were selected who had experienced attachment trauma, exhibited symptoms of attachment trauma, suffered damages to attachment, self-regulation (emotion regulation), and competency (self-system), and voluntarily agreed to participate in this study. Quantitative and qualitative analysis of the recovery from childhood attachment trauma symptoms showed that the ARC-centered Parent-Child Play Therapy program was effective in reducing symptoms of childhood attachment trauma and enhancing mother-child attachment These research results suggest that the ARC-centric parent-child play therapy program developed by this researcher is very effective in positively recovering negative neurobiological changes in the brain caused by parental abuse and neglect.