Child maltreatment poses serious consequences, while sports participation among adolescents offers a potential avenue for mitigating such consequences. This study, based on self-determination theory (SDT), examines the associations among child maltreatment, sports motivation (intrinsic and extrinsic), and satisfaction or frustration of basic psychological needs (BPNs). This study also investigated the mediating role of sports motivation in the relationship between child maltreatment and psychological adaptation. Adolescents engaged in sports were derived from the first wave of a large two-wave study (wave 1: n = 1403; wave 2: n = 618) using data on child maltreatment, intrinsic and extrinsic motivation, and satisfaction and frustration of within the sports context. Subsequently, data on psychological adaptation, including self-esteem and satisfaction with life, were collected during the second wave. Path analyses revealed satisfaction and frustration of BPNs as significant mediators in the relationship between child maltreatment and sports motivation. In addition, intrinsic motivation mediated the relationship between child maltreatment and psychological adaptation after 18 months. Specifically, the results indicated that enhancing intrinsic motivation in adolescents with a history of child maltreatment by improving satisfaction of BPNs could be an innovative intervention target.