Less trauma, less risk, high safety patients almost no pain; obvious effect, immediate results, often just after the completion of the intervention, the patient has not stepped off the stage, and reported DD foot warm, no pain! Quick recovery, 24 hours after surgery can be out of bed; even if the condition is unfortunately aggravated, it can still be treated twice; reduce the rate of amputation and the level of amputation, for the later treatment to gain valuable time. Interventional endovascular therapy can significantly improve blood flow in patients with lower extremity ischemia. Now there is a concept of “direct blood flow”. The term “direct flow” refers to blood flow to the anterior tibial and posterior tibial arteries that reach the foot, whereas the peroneal artery only reaches the ankle and must rely on side branches to communicate with the vascular network of the dorsum and plantar arch of the foot. Interventional treatment can open up direct flow to the plantar aspect of the foot.