Varicose veins of lower limbs are a very common disease, according to statistics, the prevalence rate is about 10% in adults over 15 years old. The progressive development of the disease will lead to lower limb edema, itching, skin pigmentation, ulcer formation, infection, thrombosis, varicose vein rupture and bleeding and other complications, which seriously affects the quality of life of patients. Surgery is the most effective treatment for varicose veins in the lower extremities. Traditional high varicose vein ligation + stripping is very traumatic, bleeding, long hospital stay and slow recovery of patients. EVLT was applied in Europe in the 1990s, which applies the characteristics of semiconductor laser conduction, punctures the thin optical fiber into the blood vessel, and through the conduction of laser, it can precisely destroy the intima of the blood vessel, make the vein fibrosis and achieve the purpose of vascular closure. EVLT is the most advanced method for the treatment of varicose veins in the lower extremities, and is truly a minimally invasive surgical method.