Deep venousthrombosis (DVT) is a common peripheral vascular disease, which is related to the hypercoagulable state of blood, blood flow stagnation and vascular wall damage, etc. It often leaves sequelae due to untimely treatment, and even induces pulmonary embolism (Pulmones embolism PE) and causes death. In recent years, we use our hospital preparation “thrombolytic pill” as the main treatment for this disease, and achieved relatively satisfactory results. Among them, 3 cases were under 20 years old, 63 cases were 21-30 years old, 97 cases were 31-40 years old, 39 cases were 41-50 years old, 28 cases were 51-60 years old, and 6 cases were over 60 years old. There were 126 cases with wandering superficial thrombophlebitis, 71 cases with systemic symptoms, 89 cases with a history of surgical trauma (caused after surgery), 64 cases with postpartum onset, and 83 cases with no obvious cause. There were 17 cases of blue inflammatory pain syndrome (phlegmasia cerulea dolens) and 8 cases of white inflammatory pain syndrome (phlegmasia alba dolens). (2) Diagnostic basis: formulated according to the criteria of the Chinese Medicine Industry Standard of the People’s Republic of China – Criteria for Diagnosis and Efficacy of Chinese Medical Evidence: clinically, painful swelling of the gastrocnemius muscle, pressure pain, and edema of the tibial foot and ankle were seen. Or sudden onset of painful edema of the entire lower limb with marked tenderness at the femoral triangle on the inner thigh, whitening of the skin, severe cyanosis, and decreased skin temperature. There is a generalized fever, or typical symptoms such as thickening of the skin and hyperpigmentation of the lower legs. There is a history of prolonged bed rest, sedentary lifestyle, trauma, postpartum, pelvic and abdominal surgery, tumor and other vascular disease. The diagnosis can be confirmed by combining with auxiliary examinations such as vascular ultrasound, ultrasound Doppler, venography and venous hemogram. 2. Efficacy criteria and results (1) Efficacy criteria Refer to the criteria of the Chinese Medicine Industry Standard of the People’s Republic of China – Efficacy Criteria for Diagnosis of Chinese Medicine Evidence. Cured: The swelling and pain of the affected limb disappeared, and the relevant examination improved significantly. Improvement: The pain of the affected limb disappears, the swelling is reduced, and the relevant examination is improved. Not cured: The swelling and pain of the affected limb do not disappear, and there is no change in the relevant examination. (2) Treatment results: Cured: 135 cases, improved: 90 cases, not cured: 11 cases. Total effective rate: 95. 34%. 3.Discussion The occurrence of this disease is mostly due to long-term bed rest and sedentary, the blood flow in the lower limbs is slow, the slow blood flow is easy to form thrombosis, after birth, after trauma and bleeding, the concentration of coagulation factors and platelets in the blood increases, so that the coagulation of blood increases, coupled with the use of clinical hemostatic drugs, are very easy to lead to the formation of venous thrombosis in the lower limbs, if thrombosis is formed, it blocks the return of hydrostatic fluid, and the return of blood flow is blocked, then there is Lower extremity swelling and pain, the femoral triangle on the inner thigh has obvious tenderness, and the skin is purple-blue due to excessive reduction of hemoglobin in the veins, and blue inflammatory pain (phlegmasia cerulea dolens). Sometimes the leg is obviously edematous so that the intra-tissue pressure microvascular perfusion pressure causes localized pale skin and white inflammatory pain syndrome (phlegmasia alba dolens). Chinese medicine believes that: long-term bed-ridden, sedentary is injured qi, after childbirth, trauma is more serious injury qi and blood, resulting in qi and blood deficiency, “qi is the handsome of blood”, qi deficiency is drumming power, no to promote blood transport, blood stagnation, resulting in qi stagnation and blood stasis, blocking meridians, the above “femoral swelling The above “femoral swelling” symptoms appear. Although there is deficiency of qi and blood at the beginning, the main pathogenesis of this disease is caused by stagnation of qi and blood stasis. In “Thrombolytic Pill No. 3”, rhubarb, gigantes and dilong are used to clear heat and cool the blood, remove blood stasis and detoxify the blood vessels, and open the meridians and activate the channels. According to modern pharmacological research, it has the function of lowering blood viscosity, blood lipid and cholesterol; using Boswellia, Myrrh and Xuan Hu to activate blood circulation, promote blood circulation, relieve pain and eliminate swelling; using Astragalus to support and benefit Qi, promote water circulation and eliminate swelling. The combination of all the drugs together can clear heat, activate blood circulation, resolve blood stasis, promote circulation, promote water retention and reduce swelling. It is very effective in treating this disease.