Migrant workers are the contributors of the national economy，but so far，the group still exists as a weak group. Under such two kinds of different identity，we explore the self-exaggerated preference and its relationship with attachment about 832 migrant workers. The results show：1.the self-exaggerated preference generally exists.2.In implicit level，there is no significant difference between individual characteristics and social characteristics of self-exaggerated preference.3.In terms of the overall migrant workers，exaggerated of implicit individual self-positive traits can be used to predict the degree of father communication；exaggerated of implicit social self-positive traits has a negative prediction to mother communication.