Social dysfunction is the core feature of children with autism. It is difficult for children with
autism to develop and maintain relationships with others, especially peers. Based on the concept and
operation methods of peer-medicated intervention and sandplay therapy, this study developed a case
study that uses peer-medicated sandplay as an intervention method to promote the development of social
functions of autistic children. The study conducted 12 sessions of intervention on a high-functioning
autistic child and found that his social interaction ability was improved. This is reflected in the decline
in the total score of the social reaction scale. The toys and themes of the peer sandplay gradually
enriched, and the qualitative of interactive processes was improved. Peer-medicated sandplay increases
the frequency of social interaction between children with autism and their peers and improves the
quality of relationships, improves the social communication skills of children with autism, and produces
spontaneous imitation and substitute learning behaviors in interaction with peers. Therefore, the peermedicated
sandplay promotes the development of social functions of children with autism.