Abstract: The study describes the main features of theoretical model of consistency concept in law as well as reveals the essence of "consistency of law" category. Theoretical model analysis is based on a complete review of fundamentals of law consistency: social relations in their systemic interaction, state-power nature of law, legal policy and principles of law. A special place in studying of its theoretical model occupy initial social relations that have private law character. Analysis of this problem is based on a principle of methodological pluralism; dialectical approach is taken as a basis to study legal reality. The study underlines a theoretical model’s significance for legal science and legal practice.