Simple saphenous varicose vein refers to the lesion is limited to the superficial veins of the lower limbs, including the great saphenous vein, the small saphenous vein and its branches. The superficial veins of the lesion are elongated, dilated, sinuous and flexed, and even curled into clusters, which are more obvious when standing. In the early stage, patients have soreness, discomfort and pain, and in those with longer lesions, the skin of the lower leg, especially the ankle, often has nutritional changes, hyperpigmentation, flaking, itching and even eczema. The traditional treatment methods of saphenous varicose vein include the following: 1, conservative treatment: elastic stockings, elastic bandages, etc. 2, sclerotherapy and compression bandage therapy: the commonly used sclerosing agent is 5% sodium cod liver oil acid. 3.Saphenous vein trunk and lesioned branches resection 4.selective lesioned saphenous vein resection The latest submerged guide suture technique is applied to the treatment of saphenous varicose vein by selective varicose vein submerged ligation. This technique requires only 2-4 small incisions of 1-2mm, or even only injection needle puncture, to ligate the less dilated saphenous veins with no significant backflow, so that the varicose meridians will no longer be varicose, achieving immediate therapeutic effect. Saphenous varicose vein is mostly seen in people who are engaged in standing work and physical labor for a long time, and the age of onset has a tendency to be younger. Conservative treatment has certain effect, but the treatment time is long, and it is difficult to stick to it in hot weather in summer and autumn. Traditional surgical treatment is more damaging and requires post-operative treatment such as pressure bandaging, and the response time is long. Submarine ligation treatment is a surgical operation with little damage, little risk, no obvious scar after surgery, no color change, no hardening of the vessels as in injection treatment, quick recovery after surgery, and can move as usual after surgery, which has obvious advantages over injection treatment and saphenous vein removal, and most of them can be treated as outpatient surgery, and it is the first choice for segmental saphenous varicose veins with mild expansion.