Bending function after humerus fracture usually takes 2 to 4 months to recover, and the recovery time is affected by the severity of the fracture and the patient’s recovery status. 1. Trunk humerus fracture: Trunk humerus fracture usually takes 3~4 months to reach clinical healing, it is easier to exercise in this part, and the bending function can be restored by performing functional exercises in the process of fracture healing. 2. Proximal humerus fracture: the blood supply of proximal humerus is very rich, the recovery time needs 2~3 months, but due to the ligaments around the proximal humerus, the joint tissues are more, the fracture recovery period may lead to adhesion, so the functional exercise recovery time is longer, generally need 1~2 months. 3. Fracture of distal humerus: because the elbow joint bending function mainly depends on the distal humerus and proximal ulna and radius, so the fracture position is very important, according to the healing of the fracture, it is recommended that the fracture recovery in the early stage of proper functional exercise, which will help the fracture part of the function of the recovery, together with the early exercise can be restored to the bending function in 3 to 4 months. Recovery time varies among patients with different physical conditions, and patients with poorer physical conditions may take 2 to 3 months longer to heal, so it is recommended that postoperative rehabilitation exercises be performed in a timely manner to restore function as early as possible.