Diagnostic criteria: At present, there is no unified diagnostic criteria for primary lower limb deep venous insufficiency, with reference to the Clinical Vascular Surgery, the diagnostic criteria are as follows: 1. Itchy skin, skin pigmentation in the foot and boot area, increased skin temperature, eczema-like changes, bruising dermatitis, etc., or with healed skin ulcers; 5. Lower limb venous color Doppler ultrasonography or lower limb venous non-invasive examination showed deep venous valve insufficiency. Inclusion criteria: 1, meeting the diagnostic criteria; 2, age between 20 and 80 years; 3, CEAP clinical grading of 3-6, venous ultrasound suggesting common femoral and superficial femoral venous regurgitation time greater than 3 seconds. Exclusion criteria: 1, secondary lower extremity deep vein valve insufficiency caused by diseases such as lower extremity deep vein thrombosis syndrome; 2, simple varicose veins not accompanied by deep vein valve insufficiency, etc.; 3, combined with serious primary diseases such as cardiac, cerebrovascular, hepatic, renal, hematopoietic and endocrine systems, psychiatric patients; 4, outside the age range; 5, the patient is not suitable for surgery by preoperative assessment or the patient refuses surgery or the patient refuses surgery or cannot cooperate with postoperative treatment and care.