Today, New manufacturing technologies has emerged such as the additive manufacturing (AM) that allows creating complex shapes without resorting to specific tools. Also, environmentally Conscious Manufacturing Process (ECMP) has become an obligation for manufacturers to maintain their market position. Hence it is necessary to assess environmentally these new technologies till CAD phase in the aim to choose the most ecological manufacturing process for a chosen part. This paper presents a literature review of different works relating AM to eco-design. First we introduce researches assessing environmentally the different additive manufacturing methods. Second, we present a critical review of works presenting design processes for AM. Finally, we propose an approach for eco-designing products for AM in CAD phase.