Calf traffic branch insufficiency is the main factor of chronic venous insufficiency leading to skin eczema, pigmentation, ulcers and other dystrophic changes (commonly known as polyp leg, old rotten leg), and some people suffer from such ulcers for several years. Because the ulcers do not heal for a long time or recur after healing, it seriously affects the patient’s normal life and work. Some ulcers may even become cancerous and require amputation. Chronic venous insufficiency of lower extremity mainly includes primary superficial venous insufficiency, varicose veins of lower extremity, primary deep venous insufficiency of lower extremity, venous insufficiency of deep and superficial traffic branch, and post-thrombotic syndrome of deep veins of lower extremity. There are two types of traditional treatment: conservative and surgical, but the conservative approach is not ideal as long as the surface is changed. The traditional surgical approach mostly uses the Linton and modified Linton surgical approach, which involves incision of the deep fascia through the varicose vein or the incision near the ulcer to find the traffic branch, which is somewhat blind and time-consuming, and it is often difficult to find the traffic branch because of the rupture and bleeding of the superficial varicose vein or the bleeding of the skin near the ulcer, so the traffic branch ligation is not complete. In addition, direct incision of the deep fascia to expose and ligate the traffic branches of the calf can cause a high rate of incision infection, prolonged healing of the incision, and slow healing of the ulcer as well as a high recurrence rate. The reason why traditional surgery causes high wound complications is that the incision is mostly located near the ulcer, and the active ulcer itself is a susceptible factor; secondly, the skin adjacent to the ulcer is in a state of stasis, ischemia, and hypoxia, which also leads to infection and poor growth of the incision. Third, most patients wait for the surgery process, hoping that the ulcer will be relieved. However, instead, the ulcer further worsens while waiting for surgery, causing patients to lose confidence and seriously affecting their quality of life, which becomes a clinical insurmountable problem. In order to solve these problems, Europe and the United States and other countries carried out the research of deep subfascial endoscopic perforator surgery (SEPS) at the end of the 20th century, and achieved very good results. We know that lower limb ulcers are mostly located in the foot and shoe area, and the laparoscopic incision is located in the upper part of the calf, far from the ulcer, so it can reduce the incision complications. The use of endoscopic technique to disconnect the medial traffic branch of the calf has been shown to be effective in the treatment of dystrophic skin changes in chronic venous insufficiency of the lower extremity, especially venous ulcers. We have found that the hospital stay for SEPS treatment is significantly shorter than that of conventional surgery, ranging from 2 to 14 days for SEPS surgery and 14 to 40 days or longer for conventional Linton surgery. We believe that SEPS surgery shortens postoperative hospitalization days mainly because SEPS surgery greatly reduces incisional complications caused by traditional surgery, and once the incision is infected in traditional surgery, patients have to postpone their discharge, therefore, SEPS surgery can significantly reduce patient bed occupancy days and thus save medical costs. In conclusion, we concluded that compared with the conventional surgery, the deep subfascial endoscopic traffic branch dissection in the calf has a complete traffic branch ligation, a lower incision infection rate, a lower delayed incision healing rate and a lower ulcer recurrence rate, and a shorter hospital stay, less trauma and faster recovery. In particular, it is a boon for patients who cannot be treated surgically due to the presence of ulcer surface. This patient is another ulcer patient, and one week after the operation, the ulcer was almost healed, and two small surgical incisions near the knee joint were made with minimal trauma and quick recovery.