Tumors in the parotid area are common in the oral and maxillofacial region. The parotid gland is located in the anterior and inferior part of the external auditory canal, and a parotid tumor is usually considered when a mass of varying size, one or more, is felt in front of or below the ear. Many types of tumors can occur in the parotid area, with pleomorphic adenoma being the most benign tumor and mucinous epidermal carcinoma being the most malignant tumor. About 70%-80% are benign tumors. Most benign tumors of the parotid gland are mainly mixed tumors, followed by adenolymphomas, also called Walsinomas. Benign tumors are usually painless and asymptomatic, so they are not easily detected by patients, and their course varies from a few days to several years. When it grows to a certain extent, it will cause facial deformity and may become malignant after long-term stimulation. In addition to facial deformity, mixed tumors do not cause facial nerve dysfunction. In contrast, malignant tumor of parotid gland grows faster and facial palsy occurs in 20%-30% of cases, often with spontaneous pain, and the mass is usually hard and can infiltrate the surrounding tissues. Diagnosis of parotid tumor: 1. MRI or CT: MRI and CT are commonly used for preoperative examination of parotid tumor, which will provide a lot of useful information, such as mass boundary, location and relationship with surrounding structures. However, it does not confirm the diagnosis of benign and malignant tumors. Combined with the patient’s medical history and clinical manifestations, the doctor will usually come up with a preliminary diagnosis, and it is not difficult to diagnose common tumors with more typical manifestations. Fine needle aspiration biopsy: Fine needle aspiration biopsy is the most important method to confirm the diagnosis of parotid tumor before surgery, it can provide reference diagnosis before surgery and can be an early warning for parotid malignant tumor. However, there are disadvantages such as invasiveness and potential risk of tumor implantation, which requires experienced pathologists to perform. However, since the puncture only extracts a small part of the tissue, there is a possibility that only the trees may be seen but not the forest, therefore, the final diagnosis cannot be confirmed by the results of fine needle aspiration biopsy alone. 3.Intraoperative frozen section: For intraoperative resected tumor, frozen section can be used to determine whether to carry out further treatment and treatment plan, which takes about 40min. Because of its high specificity and sensitivity, frozen biopsy technique has a non-negligible status in the diagnosis of parotid tumor. 4.Postoperative pathological examination: making paraffin sections of postoperative specimens for pathological examination is currently the gold standard for parotid tumor diagnosis. Generally, this result also prevails. For some rare or uncommon tumors, further immunohistochemistry can be done for diagnosis. Treatment is mainly surgical. The choice of surgical method is generally based on the site and nature of the tumor. The treatment options for benign and malignant tumors differ greatly, and the prognosis is directly related to the choice of treatment method.