Parotid tumors are the most common neoplastic diseases of the maxillofacial region, of which benign tumors account for more than 80% and malignant tumors for less than 20%. Benign tumors include adenolymphoma and pleomorphic adenoma, while malignant tumors include mucinous epidermoid carcinoma, adenoid cystic carcinoma, and malignant pleomorphic adenoma. Most of them are not associated with pain and facial palsy, and generally grow slowly. The treatment of parotid tumor is surgical. Benign tumor can be cured by surgery alone, while malignant tumor requires comprehensive treatment centered on surgery, and after surgery, adjuvant radiotherapy and systemic chemotherapy are required according to the condition. There are three main types of parotid tumor resection: 1. Regional gland resection Regional resection refers to the resection of tumor and 0.5cm-1cm gland around the tumor, which is the least resected area among the three types of surgery and has the best preservation of glandular secretion function. (1) Warthin’s tumor in the superficial lobe of the parotid gland, especially in the posterior lower pole; (2) smaller superficial lobe of the parotid gland, pleomorphic adenoma or other benign tumors (within 1.5 cm in diameter), which can be moderately relaxed if the tumor is located in the posterior lower pole of the parotid gland. After the 1980s, regional adenomectomy was performed on some benign parotid masses instead of the entire superficial lobe of the parotid gland, so that the function of the gland and facial shape could be better maintained and the long-term efficacy was fully recognized. It has become a mature procedure. Superficial parotidectomy is the removal of the entire superficial parotide lobe (parotid tissue superficial to the facial nerve, accounting for 70%-80% of the entire parotid tissue) including the tumor. It is mainly used for: (1) benign tumors in the superficial lobe of the parotid gland; (2) low-grade malignant tumors in the superficial lobe of the parotid gland, which are small and not closely related to the facial nerve; (3) chronic parotiditis, where conservative treatment is not effective; (4) nodular type or enlarged gland in Schegren’s syndrome, which obviously affects the aesthetics; (5) eosinophilic lymphogranuloma and other tumor-like diseases. Total parotidectomy is the removal of all tissues of the superficial and deep lobes of the parotid gland including the tumor, and is the most extensive and complete of the three types of surgery. The parotid gland on the side of the operation is completely deprived of function, leaving a more obvious depressed deformity on the lateral side of the face. It is mainly used for: (1) benign tumors of the deep lobe of the parotid gland; (2) malignant tumors of the deep or superficial lobe of the parotid gland. One of the most important issues in parotid surgery is the selection of the facial nerve. In most cases, the facial nerve should be dissected and preserved in order to maintain normal facial function and morphology. 1. benign tumors: dissect the facial nerve and preserve its integrity; 2. low-grade malignant tumors: highly differentiated mucous epidermis-like carcinoma without facial nerve palsy symptoms, the facial nerve should be dissected and preserved as much as possible, and branches closely related to the tumor should be sacrificed; 3. highly malignant tumors: adenoid cystic carcinoma, low-differentiated mucous epidermis-like carcinoma, other adenocarcinomas or squamous carcinomas, with clinical symptoms of facial nerve palsy, or seen during surgery in the vicinity of the tumor nerve darkening, thickening and hardening, or nerve trunk passing through the tumor, together with the tumor being removed.