The best time to recover from radial nerve injury is usually within 1~3 months after the onset of the disease, after 3 months the speed of recovery gradually decreases, the earlier the consultation and treatment, the better the result. Radial nerve injury is usually caused by external pulling, sharp object injury, fracture and other factors, after the injury, the thumb, index finger, middle finger can not be extended to show the hanging wrist deformity. Then nerve injury is a common clinical type of peripheral nerve injury. The best recovery period for peripheral nerve injury is generally 1 to 3 months after the onset of the disease, after 3 months the recovery speed gradually decreases, and after 6 months the progress of recovery is even slower or even leave sequelae. Rehabilitation usually starts on the same day of clinical treatment or after surgery, and usually lasts for 3 months, and if dysfunction still exists, the rehabilitation time will be prolonged accordingly. When the radial nerve injury hanging wrist should be timely consultation, standardized treatment, active rehabilitation, in order to avoid delaying the condition.