Aquaporin 1 (AQP1) is an aquaporin distributed in the peripheral nervous system. It has been found in neurons and glial cells of peripheral nerve structures, including trigeminal ganglion, dorsal root ganglion and enteric nervous system. AQP1 may be involved in the regulation of water balance of ganglia and nerve fiber bundles in the peripheral nervous system under physiological and pathological conditions, and plays a key role in maintaining the intracellular and extracellular water balance of peripheral nervous system under pathological condition. Knowing the structure and function of AQP1 can contribute to the understanding of the pathophysiology of the nervous system, providing new ways and methods for clinical treatment. This review summarizes the recent researches on AQP1.