Diabetic peripheral vascular disease is an important reason causing dead and deficient in diabetes.Peripheral vascular disease mainly occur in lower limbs,neck and upper limbs.Diabetic peripheral vascular lesions are correlated with hyperglycemia,abnormal of endothelium function and inflammation.It is important to study for early diagnosis and treatment and improving patients′ prognosis.These lesions could be found earlier with the ultrasonic Doppler examination.That can provide positive significance to diagnose and reseach of peripheral vascular disease in type 2 diabetes.