This study examines legal protection for children in conflict with the law within the Juvenile Criminal Justice System and evaluates its effectiveness through a progressive law perspective. This is normative legal research using statutory and conceptual approaches, analyzed in a prescriptive-argumentative manner. The novelty of this study lies in using progressive law not merely to confirm the existence of child protection norms, but to test the gap between legal regulation and actual protection in practice. The findings show that the Juvenile Criminal Justice System provides diversion, restorative justice, and limits on detention, yet implementation remains weak from the investigation stage to post-adjudication rehabilitation. Diversion is not consistently applied, children are still placed with adult detainees, prison overcrowding increases children’s vulnerability, and the recovery of children’s rights remains far from optimal. These findings indicate that legal protection for children is still ineffective as long as law enforcement remains formalistic and has not fully prioritized the best interests of the child. Keywords: child protection, progressive law, Juvenile Criminal Justice System
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