Diabetic retinopathy is a common and serious diabetic eye disease,which often causes vision loss and blindness.The disease has seriously affected the lives of millions of people in the world.Diabetic retinopathy is divided into proliferative diabetic retinopathy and non proliferative diabetic retinopathy.Diabetic retinopathy is a potential factor of blinding of patients with diabetes,the diagnosis and treatment in vascular abnormalities in the late stage of the disease.In this article,we reviewed the diagnosis and treatment of diabetic retinopathy in order to provide effective data.