The present thesis aimed at analyzing and answering, in the theological sphere, how the Catholic Church exercises its evangelizing mission in favor of migrants. Migration processes can be experiences of Christian living because in the midst of mishaps, success and failure, may make human s encounter with God possible, in Jesus Christ, in the concrete reality in which the being is found. This way, the Catholic Church, in its pastoral action in favor of migrants, must be characterized by gratuity, receptivity, mercy, justice and love, boosting what is the best in human beings. In order to capture appropriately the material object, i.e., the reality of migration, the survey opted for sampling, focusing its attention to the Brazilian migration executed to a particular area - Boston- Massachusetts- the USA. Throughout fieldwork, with qualitative profile, and bibliographic study of the major works that deal with the matter, tried to understand what occurs with this specific reality of migration. As it is a theological thesis, the formal objective was gathered at the nucleus of Christian experience, i.e., at the encounter with Jesus Christ and adhesion to an ecclesial community and its consequences. Gathering both objects of research we realized the importance of the relationship between faith and culture, seeking to evaluate to what extent the immersion in a new culture, in this case North American, implies in faith loss or change. The migration process analyzed through Christian faith perspective leads to overcoming the rigid and strict structures posed as barriers that limit the freedom and the purpose of human existence in a diverse world. Therefore, instead of building walls, bridge building to allow dialogue and exchanges that treasure life are necessary. Distinguishing what effectively belongs to Christian experience and what is cultural intervention to its living is essential.