Post-brain hemorrhage thrombosis is often referred to as deep vein thrombosis of the lower extremities due to brain hemorrhage. The main reason for this is that after a cerebral hemorrhage occurs, when the bleeding volume is large, it leads to coma and limb dysfunction, which often requires bed rest. Because of the dysfunction of the limbs, the patient’s blood flow slows down due to the relatively low limb activity, which can easily lead to the formation of lower limb DVT if the corresponding treatment measures are not taken for a long time. Once the lower extremity deep vein thrombosis is formed, if early intervention is not carried out, the thrombus can easily dislodge and cause pulmonary embolism, resulting in serious consequences, and the patient may die soon. To prevent lower extremity DVT, it is recommended to routinely wear compression stockings and to consider pneumatic pump therapy. After the patient’s condition is stabilized, active movement of the patient’s limbs is required, and molecular heparin sodium can be used to prevent lower extremity deep vein thrombosis.