This article investigates the justice of children and youth nowadays, the designation its structure and functions. The author analyzes from the constructive approach: the existing interpretation of the term "justice functions", the types of functions and their level hierarchy. Describing the normative sense of children and young people justice, the author identifies its psychological basis and effective conditions for formation society legal culture. The article gives the author's approach to the understanding the structural components of the children and youth legal consciousness. Logical-normative, emotional-imaginative and fundamentally strong-willed blocks of justice are stressed. Opposite to the descriptive approach to the understanding justice, traditionally existed in the jurisprudence, the author proves, that a constructive approach to the formation justice lets measured, evaluated and used practically quantitative and qualitative characteristics and data of justice, which lets influence the management processes above justice, and, it means, raise its level in prevention social crime.