Tendon transfer surgery can be performed for ptosis caused by peroneal nerve injury, and tendon transfer surgery is not effective for ptosis caused by the central nerve. If the foot is in plantarflexion, there is a complete inability to actively dorsiflex or to perform inversion as well as eversion. Tendon transfer surgery is generally referred to as tendon transfer surgery, which is the treatment of choice for foot ptosis caused by peroneal nerve injury, where nerve sutures cannot be performed. However, foot drop can also be caused by other reasons, such as the foot nerve, sciatic nerve, lumbosacral nerve root, cerebral nerve, etc. These causes of foot drop can not be repaired by tendon transfer surgery, and it is not effective. When foot drop occurs, it is recommended to choose the appropriate treatment method under the guidance of the doctor. In addition to surgical treatment, rehabilitation exercises and wearing a brace are also available.