Overview: The brachial plexus is a group of peripheral nerves connected to the spinal cord in the cervicothoracic region, and is mainly responsible for the sensory-motor functions of the shoulder, arm and hand. Brachial plexus injury can cause complete or partial paralysis of the upper limbs, and the common clinical causes of injury are accidents in labor and life and infant birth injury. Based on years of clinical experience in diagnosis and treatment of brachial plexus injury, we apply minimally invasive surgical techniques to partially or completely restore the function of paralyzed upper limbs by using brachial plexus nerve release, repair, grafting, transposition, and muscle strength reconstruction. Diagnosis: Loss of upper limb function or impairment after brachial plexus injury is often easily detected by clinicians, but it takes some time for the clinic to make a definitive diagnosis and begin surgical treatment, because often these patients have other organ or bone injuries that are more urgent to deal with. However, the definitive diagnosis and treatment of the brachial plexus remains, in principle, as early as possible, and should not normally take more than three months. TREATMENT: The choice of treatment is determined by the type and extent of the injury, with milder injuries healing on their own and severe injuries requiring surgery to help repair them. Depending on the injury, we offer nerve membrane internal and external release, nerve grafting, nerve transposition and tendon transfer skeletal reconstruction to restore upper limb function. Exercise instruction and observation for postoperative functional recovery is an important part of our outpatient work.