Postoperative venous thrombosis necessitates absolute bed rest and strict braking to prevent dislodgement of the thrombus, which can enter the vital organs with the blood flow and lead to organ embolism, such as pulmonary embolism. Venous thrombosis after surgery is very common in clinical practice, due to the slow blood flow after surgery as well as the possible disruption of the vessel wall by the surgery, the collagen fibers under the vessel wall are exposed and prone to thrombosis. After the development of venous thrombosis after surgery, strict bed rest is required, avoiding any walking, both lower limbs can be raised to avoid blood stagnation, and the patient avoids too much force when defecating. If there is a thrombus in the body after the operation, you can take some anticoagulant drugs such as heparin under the guidance of the doctor; or you can take urokinase and other drugs to dissolve the thrombus; in serious cases, you need to take out the thrombus by surgical operation after completing the relevant examinations. Venous thrombosis is prone to fatal pulmonary embolism and other critical symptoms, after surgery must pay attention to observation, follow the doctor’s advice early appropriate activities and other treatments, to prevent thrombosis, such as thrombosis, should pay attention to observation, and timely and effective treatment.