How long it takes to sit up after thoracic internal fixation surgery depends on the degree of fracture and other physical conditions of the patient, and generally it takes 3~6 weeks of bed rest to sit up. If the patient’s general condition is good, the fracture situation is not serious, and the body tolerance is strong, generally in about 3~4 weeks can sit up appropriately. If the patient’s tolerance is poor, the fracture situation is more complicated should be discretionary, can be pushed back about a week. Care should be taken to stabilize the thoracic spine and wear a brace when it is time to sit up to prevent secondary injuries. As patients have individual variability, they should consult with a specialist, conduct recovery training under the doctor’s guidance, and decide how long it will take to sit up according to the recovery situation.