Oral tumor is the sixth most common tumor in the body. Although the incidence rate is not too high, once it occurs, it will change a person’s appearance, eating and breathing conditions, thus seriously affecting the physiological and psychological health of patients. Currently, the 5-year survival rate of oral cancer patients is about 60%, which is not satisfactory. If we can actively prevent cancer before it forms or intervene in time to treat it, we can definitely receive better results. Research shows that 30% of oral cancer is related to smoking, 35% is related to diet, 3% is related to alcohol consumption, and only 17% is related to factors that are difficult to control, such as geographical factors (3%), environmental pollution (1%), occupational factors (4%), reproductive factors (7%) and medical factors (1%), and another 15% has unknown exact causes. It can be seen that a large number of cancer-causing factors can be controlled through publicity and education, such as quitting smoking and adjusting dietary structure. The prevention of cancer can be divided into 3 levels: Level I prevention is etiological prevention, which is the most fundamental measure to reduce the incidence rate; Level II prevention is mainly to implement the three early detection, early diagnosis and early treatment to improve the cure rate; Level III prevention refers to the treatment and therapy of patients, whose goals are to cure the tumor, prolong the life span, reduce the pain of the disease and prevent recurrence. The objectives are to cure the tumor, prolong life span, reduce pain and prevent recurrence. The prevention of oral and maxillofacial tumors includes: 1. Eliminating or reducing cancer-causing factors Removing the cause is the best prevention method. The prevention of oral and maxillofacial tumors should focus on the elimination of external chronic irritants, such as timely treatment of root remnants, crown remnants and misaligned teeth, as well as grinding down sharp tooth tips, removing bad restorations and bad local or complete dentures. Pay attention to oral hygiene, do not eat too hot and stimulating food. In oral preventive health care, we should quit smoking and alcohol; strengthen protective measures when working in outdoor exposure or in contact with harmful industrial substances; avoid excessive mental tension and depression, and maintain optimism, which also have certain significance in preventing the occurrence of oral tumors. 2.Treating precancerous lesions in time Timely treatment of precancerous lesions is an important part of preventing and interrupting oral and maxillofacial cancer tumors. The most common precancerous lesions of oral and maxillofacial area include white spots and red spots. The common precancerous states include oral lichen planus, oral submucosal fibrous degeneration, discoid lupus erythematosus, epithelial hyperkeratosis, congenital dyskeratosis, syphilis, and staining dry skin disease. In addition to active medication to relieve symptoms, the most important thing for the above lesions is that they should be followed up regularly and observed closely. In any case of suspected malignant change, timely biopsy should be performed to achieve the purpose of early detection and early treatment. 3.Strengthening cancer prevention publicity Strengthening public education and implementing preventive measures, especially quitting smoking, can greatly reduce the incidence of oral squamous carcinoma. The public should be made to understand the danger of cancer tumors and raise their alertness to cancer tumors; so that they can understand some basic cancer prevention knowledge and strengthen their self-care ability. 4. Carry out cancer prevention screening and monitoring of susceptible people Elderly patients are sometimes slow to respond, have weakened self-awareness and subjective symptoms, which often delay diagnosis and treatment. Therefore, it is more necessary to carry out cancer prevention screening to achieve early detection and early diagnosis, so as to obtain early and effective treatment.