The incidence of gestational diabetes mellitus(GDM)is on the rise in China.GDM has adverse effects on maternal and infant health,and its pathogenesis is still unclear.In recent years,dietary inflammatory in-dex(DⅡ)has been linked to the development of several chronic diseases,such as type 2 diabetes.GDM is consid-ered to be the very early stage of diabetes,so its correlation with DⅡ has gradually attracted the attention of some re-searchers.In this article,the sources of DⅡ,its relationship with GDM,and the possible mechanism of GDM caused by DⅡ were reviewed,in order to explore a new preventive on the occurrence of GDM from the perspective of dietary inflammation,and provide new ideas for the dietary guidance of GDM high-risk women.