school-aged This study examined the relationship between parents’ adult attachment (anxiety and avoidance) and growth after adversity, in parents of school-aged children with developmental disabilities via parenting efficacy and disability acceptance. Self-report data of 152 parents of 6-12 years old children with developmental disabilities were analyzed using the SPSS 28.0 and process macro. The results indicated the significant dual mediating effects of parenting efficacy and disability acceptance. First, the relationship between parent’s adult attachment, growth after adversity, parental efficacy, and disability acceptance of children with school-aged developmental disabilities, a negative correlation was found between parental attachment and growth after adversity. Additionally, a negative correlation was found between parental attachment and parental efficacy. However, among parents’ adult attachments, unlike anxiety attachment, avoidant attachment had a negative correlation with parental efficacy. Contrarily, parental efficacy was found to be corelated with growth after adversity and disability acceptance. Second, among the attachments of parents of school-aged children with developmental disabilities, the dual mediating effects of parental efficacy and disability acceptance were confirmed in the relationship between avoidant attachment and growth after adversity. These findings provide a theoretical foundation to support the growth after adversity of parents of school-aged children with developmental disabilities.with developmental disabilities, Adult attachment, growth after adversity, parental efficacy, disability acceptance