Currently,there is no study on the unified coding of the spinal nerve and its main branches.The positions of spinal nerve were encoded according to the basic anatomical principles from top to bottom,from inside to outside and from front to back,with reference to AO bone classification and somatic artery coding and injury classification system.The segmental coding of spinal nerves was decided by its branches and running characteristics.The spinal nerve injuries were encoded by a combination of numbers and letters.The first number represented the region,the second represented the injured nerve,and the third represented the specific segment of injured nerve.The injuries of spinal nerve were divided into 5 categories according to severity.The first letter indicated the category of injury,and the second indicated the orientation of the injured nerve.The functional score scale of the innervation area was prepared based on the evaluation of motor function,sensory function and the results of neurophysiological examination.This scale was used to classify the neurological injuries,guide the clinical treatment and evaluate the prognostic outcomes.This coding and classification system can clearly and comprehensively describe the location and type of spinal nerve injuries,and it is convenient for the diagnosis of nervous system damage.It also has important reference value for treatment and prognosis evaluation.