Clinically, the number of patients with diabetic toe ulcers and blackened necrosis is gradually increasing, and with the onset of autumn and winter, similar patients also begin to develop the disease. In the past, when encountering such a condition, internal medicine doctors mainly control blood sugar, anti-platelet agglutination, improve microcirculation, anti-inflammatory and anti-infection to control the development of the disease, and if the limb can not be saved, can only ask for surgical help, amputation surgery. According to statistics, the number of people with diabetes in China ranked second in the world in 2008 and has ranked first in the world in 2010, reaching nearly 100 million people in 2011, and diabetic foot accounts for about 12.4% of diabetic patients, and its amputation rate is 7.3%, so its number of patients is very considerable. How to save the pillars on which patients walk? Doctors at home and abroad have conducted a lot of research work, both from the pathogenesis, the process of lesions, treatment methods and therapeutic drugs, and have also greatly delayed the development of the disease and saved many limbs. Recently, new breakthroughs have also been made in endovascular interventions. Previously, endovascular interventions focused on opening the blood vessels above the ankle joint, which improved blood circulation to the foot and accelerated healing of toe ulcers through large-vessel recanalization therapy (our hospital began this study in 2007). Recent studies have shown that opening the plantar artery arch can greatly improve the blood supply to the toe and lead to the healing of toe ulcers. Therefore, vascular interventionalists believe that once a toe ulcer is detected, the first step should be to open the lower extremity artery and the plantar artery arch. However, due to the difficulty, high requirements and high cost of this technique, it is still difficult to be popular in China.