Abstract: Diabetes is a common chronic metabolic disease characterized by hyperglycemia. Oxidative stress and oxidative damage have been proposed to contribute to the occurrence and development of diabetes and its complications. With the selective antioxidant effects， hydrogen molecule has attracted wide attention， from researchers at home and abroad， regarding its role in diabetes and its complications. Great progress has been made in promoting hydrogen molecular medicine in the field of diabetes. This review mainly focused on two aspects of the research： basic experiments and clinical trials. In the basic experimental research part， the effects of hydrogen molecule on blood glucose regulation and diabetic complications were discussed. The aim of this review was to provide ideas and references for further research of hydrogen molecules on diabetes and its complications.