To rehabilitate brachial plexus injury, firstly, it is necessary to get rid of the cause, eliminate inflammatory edema, reduce further damage to the nerve, and prevent contracture and deformity from occurring. Second, it is necessary to prevent adhesions, promote nerve regeneration, enhance muscle strength and promote the recovery of sensory function. The main aspects of rehabilitation training are: 1. physical therapy, such as through electrotherapy, light therapy, ultrasonic therapy, etc. 2. active functional training can be performed on the injured limb, and orthotics and fixed upper limbs can also be used to improve limb mobility and avoid orthopedic repair surgery. 3. some training to promote the recovery of sensory function is used, such as sympathetic ganglion closure therapy, interferential electrotherapy, laser therapy DC drug introduction therapy, electroacupuncture therapy, etc. Generally speaking, if the muscle strength continues to recover within three months after the brachial plexus injury, it can continue to be observed. If there is no recovery during this period, surgical exploration may be considered.