The present dissertation had as objective to analyze the complement relation among the new access politics to the public superior education, more specifically the affirmative actions and the constitution of the student actions assistance in the federal universities. It was accomplished as an example of the student assistance the Federal University of Rio de Janeiro - UFRJ. The register of actions and services that this university offers to the student body of the graduation was chosen as a study of the habitation benefit because of its peculiar centrality in the current conjuncture of the politic expansion of the superior education and for be part of the strategy, mainly to the students that have socioeconomic difficulties and those that migrate to UFRJ. In this manner, the work camp was accomplished with students that are contemplated by the housing benefit in the year 2012. From the analysis of the empirical material of the investigation, it was noted that the current model of expansion of the superior teaching system has promoted in parts the student mobility among the most different teaching institutions existing in Brazil s regions. In the case of UFRJ it was observed this tendency after the introduction by the universities of the ENEM. This migration has been creating a strong pressure to the increase of the benefits and student assistance services in UFRJ. Because of this reason, it grows the request for vacancy to the student housing in the current building of the student residence and for the creation of new services that were already assured by the PNAES. In this interim there are criticisms about the focus of the student assistance in the students known as poor in the university and, so higher levels of universalization of its actions and services must sought to well attend all the problems complexity that interferes in the academic trajectory of the students. The construction of student actions assistance is an important element to the guaranty of the permanence in the university.