To evaluate using meta-analysis the effect of parotidectomy on the incidence of immediate postoperative facial nerve paralysis and chronic facial nerve paralysis. Methods: A meta-analysis was conducted including relevant articles published from 1970 to December 2020. Studies meeting the inclusion criteria were analyzed by Stata 16.0 software. The effect of intraoperative facial nerve monitoring (monitoring group) versus no facial nerve monitoring (control group) on the incidence of postoperative facial nerve paralysis were compared. Re? sults: Fourteen clinical studies were included. Meta-analysis showed that the incidence of immediate postoperative facial nerve paralysis in the monitoring group was lower than that in the control group (27.7% vs. 38.2%, P< 0.05), but there was no significant difference in the incidence of postoperative chronic facial nerve paralysis (5.1% vs. 9.8%, P>0.05). Four randomized controlled studies were included in this investigation. Meta-analysis showed that there was no significant difference between the monitoring group and control group in the incidence of immediate postoperative facial nerve paralysis and that of postoperative chronic facial nerve paralysis (42.3% vs. 51.7%, 5.6% vs. 11.8%, both P>0.05). Conclusion: Intraoperative facial nerve electrophysiological monitoring can reduce the risk of immediate postoperative facial paralysis, but it has no significant effect on subsequent chronic facial nerve paralysis. However, since only a small number of randomized controlled trials were studied, further analysis is necessary.