Abstract: 　Objective　To explore the clinical menifestation, electrophysiological characteristics and prognosis of demyelinating and axonal Guillain-Barré syndrome (GBS) in children. Method　A total of 81 children with GBS were divided into demyelinating  and axonal subtypes according to the results of two electrophysiological examinations. And the clinical, neuro electrophysiological characteristics and prognosis of the two groups were analyzed. Results　There were 60 cases of demyelinating GBS and 21 cases of axonal GBS. In children with axonal GBS, there were 5 cases of reversible conduction block. The interval of onset to fastigium in axonal GBS was shorter than that of demyelinating subtype, and blood antiganglioside antibody was more common, and there were statistically differences (P all<0.05). The age at onset, the history of the prodromal infection, the sensory symptoms, the cranial nerve involvement, the impairment of the autonomic nervous function, the cerebrospinal fluid protein-cell separation, and the HG scores at the time of admission and during fastigium were similar between the two groups (P>0.05). Children with reversible conduction block had faster recovery than those without reversible conduction block in axonal GBS, and there was statistical differences (P<0.01). There was no difference in short-term prognosis (2 months after discharge) and long-term prognosis (1 years after discharge) between the axonal GBS and demyelinating GBS children (P>0.05). Conclusion　Axonal GBS clinically progressed more rapidly than demyelinating subtype, but there was no difference in prognosis between them. Also, axonal GBS with a reversible conduction block recovered faster.