To explore the influence of family sports behavior environment on adolescent internet addiction behavior, and to explore the role of parent-child and peer relationships at the interpersonal relationship level.

Convenience sampling was used to survey 909 junior high school students using the Family Sports Behavior Environment Scale, 10 item Internet Addiction Scale, Parent-Child Intimacy Scale, and Children and Adolescents Peer Relationship Scale.

The chain mediation effect analysis showed that parent-child relationship and peer relationship played a mediating role between family sports behavior environment and internet addiction, respectively. The mediating effects of the three paths in the father-child relationship accounted for 24.9%, 11.4%, and 9% of the total effect, respectively. The mediating effects of the three paths in the mother-child relationship accounted for 25%, 8.3%, and 8.3% of the total effect, respectively.

Family sports behavior environment can directly predict the degree of internet addiction among junior high school students, and at the same time, family sports behavior environment can indirectly influence the internet addiction behavior of junior high school students through the chain mediation effect of parent-child and peer relationships.