Based on the supreme will of the sovereign and the requirements of the consistency of the legal order,the legislature has the obligation to clarify the constitutionality of its legislation,so as to play the function of the representative organ to safeguard the people's sovereignty in both substance and form.After the latest revision of the Legislation Law in 2023,the legalization of the legislative subject's constitutional reasoning obligation will serve as a driving force for the comprehensive development of the constitution implementation system.It includes the'whole-process'control of the legislation(the control before,during and after the legislation),and the internal control of the legislative content(the'whole-field'control of the legislative reasoning structure from rationality to constitutionality).China's constitutionality reviewpracticeis responding to the question of the'representative supervision model'through functional division of powers,compatibility with specific reviews,and'strong'democratic procedures.The theoretical principles embedded within this mechanism will provide new thoughts for the study of the constitutional supervision model in the world,and provide theoretical support for the construction of an independent knowledge system of Chinese constitutional law.