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Objective The purpose of the study is to explore the application value of the nerve monitor adopted to pinpoint facial nerves before anatomization during a parotid tumor surgery. Methods Facial nerves of 36 patients were pinpointed by N800 nerve monitor produced by Shandong Weigao Group Medical Polymer Co. Ltd before being anatomized and exposed in parotid surgeries in order to protect the corresponding facial nerve branch and complete the related surgery. Results All the facial nerves of the 36 patients were located precisely and 108 related facial nerves were suc-cessfully anatomized and protected without any damage. Conclusion Pinpointing the facial nerve branch with a nerve monitor before anatomization pro-motes not only the efficiency of the surgery but also the safety of it and is proved to be more significant in a secondary surgery.