Oral cancer is divided into tongue cancer, cheek cancer, gum cancer, lip cancer, floor of mouth cancer and palate cancer depending on the site of occurrence, among which tongue cancer is the most common. Oral cancer is commonly found in middle-aged and elderly people, and there are more men than women, but the incidence rate of women has been reported to increase significantly recently. According to experts, oral cancer is a chronic pathological process that requires a longer period of precancerous process before it enters into typical or obvious cancerous lesions. Oral cancer is mostly found in superficial parts of the oral cavity, which is easy to be diagnosed early and treated timely. Experts say that to prevent oral cancer, first of all, we should eliminate cancer-causing factors, such as early treatment of diseased teeth, especially residual roots, residual crowns, misaligned teeth and sharp tips of grinding teeth, and removal of unsuitable partial or full dentures; meanwhile, we should pay attention to oral hygiene, not to eat overly hot and stimulating food, quit bad habits such as smoking and alcohol, and try to avoid frequent damage to oral mucosa. Secondly, precancerous lesions should be treated in time. Meanwhile, regular examination should be conducted for early detection. It is recommended to go to oral and maxillofacial head and neck tumor clinic regularly for examination, timely diagnosis and early treatment. Compared with tumors in other parts of the body, oral cancer has better treatment effect. Oral cancer patients who are detected early and treated early can be completely cured, and patients should have confidence in the treatment effect.