Major lumbar fusion surgery shall be lumbar fusion surgery and it is not a permanent inability to bend after lumbar fusion surgery. Bending is accomplished by the hip joints as well as the vertebrae in the lumbar region at the same time. There are five lumbar vertebrae in the human body, and lumbar spine fusion surgery usually fuses two of them together, and the remaining lumbar vertebrae are able to move around, therefore, it is not permanently unable to bend down after lumbar spine fusion surgery, and activities can be carried out gradually after the wounds have recovered. Patients should rest in bed after lumbar fusion surgery and not get out of bed too early to avoid damage to the lumbar region. In addition, avoid sitting and standing for a long time, avoid repeated bending too early, which is unfavorable to the recovery of the condition. During the recovery period, you can follow the doctor’s instructions for appropriate activities to enhance the muscle strength of the lumbar region. After lumbar fusion surgery, patients should go to the hospital for regular checkups to observe the recovery of their condition.