Diabetes is a kind of endocrine metabolic disease, which mainly including type 1 diabetes and type 2 diabetes, most of them are the latter, with low course and different degrees of complications. The incidence rate, disability rate and fatality rate of diabetes are quite high, which bring a big challenge for the treatment. For now, there are many researches and discussions in animal models of type 2 diabetes complications at home and abroad, mainly through the injection of STZ to induce type 2 diabetes complications, which can show the lesion characteristics better, all of these study can provide some references for the prevention and curing of type 2 diabetes.