The following work aims to establish a diachronic analysis of the process of writing of the Portuguese author Carlos de Oliveira, and it will be held towards the new-realism mechanisms. His first novel published in 1943, Casa na Duna, up to his mature style in the novel Uma Abelha na Chuva, published in 1953, it can be seen the evolution of his strategy of writing in which the author tries to build a perspective from the tough political process that Portugal was going through during the second half of the twentieth century. This analysis objects to present the reader a great amount of stylistic views that has to do with the Portuguese New-Realism. In order to present a wider overview, this thesis will conclude that the author goes beyond the new-realism`s barriers to build a novel whose physical, financial and psychological oppression, was well- represented by Carlos de Oliveira s mimesis operation.