Abstract: Aux/IAA genes, are classified as early auxin response genes, it encodes the protein that can modulate the expression of auxin-response genes by interacting with auxin response factors, thus play a central role in auxin signal transduction of plants. In order to further study the molecular mechanism of auxin signal transduction, this paper introduced the recent advances in the structural characteristics, tissue expression specificity , and biology functions in plants growth and development of Aux/IAA genes, to provide the basis for improving the application value of Aux / IAA genes and modifying species at the molecular level.