Parotid tumor and lobectomy with preservation of the facial nerve is the standard procedure for parotid tumors in most of the medical institutions in China, but the postoperative symptoms of Frey’s syndrome, local depression deformity, and postoperative numbness in the auricular region seriously affect the quality of patients’ postoperative survival. The authors carried out a series of systematic improvement and optimization of the traditional surgical methods. Postoperative tumor recurrence, facial paralysis, salivary fistula, Frey’s syndrome, auricular numbness, facial appearance, dry mouth, operative time, bleeding, and postoperative hospitalization were observed. The incidence of facial palsy, tumor recurrence, dry mouth and salivary fistula, as well as the operation time, bleeding volume and postoperative hospitalization were not significantly different in the modified functional surgery group compared with the conventional surgery group. The incidence of numbness in the auricular region, Frey’s syndrome, and marked asymmetry of facial appearance were significantly lower in the modified functional surgery group than in the conventional treatment group. The study concluded that compared with the traditional parotid surgery style, our recommended modified functional parotid surgery guarantees complete tumor resection while maximally preserving the patient’s morphology and function, which is worthy of widespread promotion and application in clinical practice.