Guillain-Barré syndrome is known as Guillain-Barré syndrome. The examination items needed for Guillain-Barré syndrome are mainly cerebrospinal fluid examination, and other examinations may include serum blood examination, neurophysiological examination, liver and renal function examination and so on. 1. Cerebrospinal fluid examination: If protein cell separation is found in cerebrospinal fluid examination, it is one of the characteristics of Guillain-Barré syndrome, which is of great significance to the diagnosis of this disease. In most patients, protein is elevated to varying degrees within 2 to 4 weeks, but rarely exceeds 1.0 grams per liter. Sugar and chloride are normal, and the white blood cell count is usually normal, showing protein cell separation. 2. Serologic examination and neuroelectrophysiologic examination: a few patients will be found to have elevated creatine kinase through serologic examination, and some patients will have elevated ganglioside antibody. Through nerve conduction measurement, it suggests the existence of demyelinating lesions in peripheral nerves, which is valuable for the diagnosis of demyelinating lesions. 3. Liver function tests, renal function tests, routine blood tests, blood glucose, and so on. Improve these tests to prepare for further treatment. After the onset of Guillain-Barre syndrome, improve the auxiliary examinations under the guidance of the doctor.