Thrombosis prevention means to prevent the formation of lower limb deep vein thrombosis or pulmonary embolism by physical or pharmaceutical means, because the lower limb deep vein thrombosis has a great impact on the patient, affecting the patient’s legs, and if the thrombus is dislodged, it can lead to the formation of pulmonary embolism, which can cause respiratory dysfunction and may also lead to sudden death. Therefore, it is very important for the patients themselves or the whole domestic population to prevent lower limb deep vein thrombosis or pulmonary embolism, which can reduce the consumption of medical resources and is also very important for the maintenance of patients’ health, because thrombosis can be prevented, for example, by physical methods, so that patients can move more and drink more water, and also by using compression pants, and the prevention can be done by using anticoagulant, blood-activating and blood-stasis-removing drugs. The prevention can be done with anticoagulant, blood-activating and stasis-removing drugs.