The purpose of this research is to analyze and find out the regulations of weaknesses that arise in the legal protection of children as perpetrators of crimes of violence against children based on the value of justice, and to reconstruct the regulation of law protection of children as perpetrators of criminal acts of violence against children based on the value of justice. The research method uses a constructivist paradigm with a sociological juridical research approach and a descriptive juridical research type using Qualitative data analysis methods. The results of the study show that the Weaknesses in the regulation of legal protection for children as perpetrators of criminal acts of violence against children at this time, from the aspect of legal substance, the legal formulation that regulates the protection of perpetrators and sanctions for criminal acts of child violence is still not precise. In terms of the legal structure, the synergy between law enforcement officers is not yet optimal, so the synergy is needed from the police, prosecutors, and the judiciary. From the aspect of legal culture, it is necessary to socialize about legal protection so that children who are in conflict with the law do not get a bad stigma as perpetrators of crime. Based on this, the Reconstruction of legal protection regulations for children as perpetrators of criminal acts of violence against children based on the value of justice in Article 59 a of Law Number 35 of 2014 and Article 18 of Law Number 11 of 2012.