This work aims to study Labor Law from a principles-logic based vision, where the fundamental principles of the constitutional process are examined in a focused vision of Labor Law, considering the peculiarities of Labor Law and its impact on employment practices, particularly in view of the principle of protection that, in this study, as part of a larger principle, the principle of compensation, positions the parties in the complex obligatory employment arrangement. It makes a systematic analysis of Labor Law, considering concepts of general Law theory, Constitutional Law, Labor Law, Civil Procedural Law and Procedural Labor Law. Following the establishment of this premise based on lessons from General Law Theory and the development of ideas related to, and from a systematic interpretation of Positivist Rights, it performs an analysis of legal norms, and labor practice with emphasis on the principles. The study based on general concepts, through constitutional analysis, legal and doctrinal matters, including a more pragmatic viewpoint, gives finally, its conclusions on the theme: Labor Law from a principles-logic based vision, the Federal Constititution and the principle of compensation in the complex obligatory employment arrangement