Aim We examined patients with type-2 diabetes mellitus(T2DM) and hypertension using color Doppler ultrasound to observe the characteristics of atherosclerosis in lower artery.It would provide a theory for lower vascular disease prevention in patients with T2DM and hypertension. Methods 70 T2DM patients were divided into two groups: 35 type 2 diabetes without hypertension and 35 type 2 diabetes with hypertension,35 people in the control group received lower extremities vascular Doppler ultrasonography test.It included both lower extremities femoral artery,popliteal artery,posterior tibial artery and dorsalis pedis artery.The intimal-media thickness(IMT) value,plaque size,resonance,distribution and haemodynamics index of every subjects were recorded. Results Plaque of lower extremities in type 2 diabetes without hypertension and type 2 diabetes with hypertension were higher than the controls(P><0.05).The plaque incidence rate and IMT in group type 2 diabetes without hypertension were much lower than group type 2 diabetes with hypertension(P><0.05).Compared with the controls,the femoral artery,popliteal artery,arteria dorsalis pedis peak value flow rate cut down in the type 2 diabetes without hypertension and type 2 diabetes with hypertension group(P><0.05). Conclusion It can detect the characteristics of atherosclerosis in lower artery in patients with type 2 diabetes mellitus(T2DM) and hypertension by color Doppler ultrasound.In the two-dimensional images of the performance of the lower extremities artery IMT-irregular thickening,plaque formation,particularly the main artery distal small;Color Doppler showed femoral artery,popliteal artery,dorsalis pedis artery peak velocity slowed down,pulsatility index(PI)raised.