Laryngeal cancer is a malignant tumor occurring in the larynx, which is divided into supraglottic, infraglottic, subglottic and transglottic cancers, with the vocal cord as the boundary. The early symptoms of laryngeal cancer in different parts are different. 1.Supraglottic cancer: there are no symptoms in early stage, and even when the tumor has developed to a considerable extent, there are often only mild or non-specific symptoms, such as itching, foreign body sensation, swallowing discomfort, etc. 2.Vocal tumor: Early symptom is change of voice, starting from fatigue or hoarseness, without other discomfort, which is often mistaken for “cold” or “laryngitis”, especially for patients with history of chronic laryngitis. It is recommended that patients over 40 years old with hoarseness for more than 2 weeks, which is not improved by vocal rest and general treatment, must be carefully examined by laryngoscopy to determine whether there is cancer. Subglottic carcinoma: Subglottic carcinoma of larynx is less common, because of its hidden location, early symptoms are not obvious, and it is not easy to be detected in routine laryngoscopy, so it is very easy to be misdiagnosed. 4. Transvocal cancer: also due to the deep and hidden location of the tumor and its slow development, the early symptoms are also not obvious, and when the first symptoms such as hoarseness appear, the disease has progressed to different degrees. As mentioned above, early symptoms of laryngeal cancer can be manifested as voice changes, such as hoarseness, but most patients do not have obvious early symptoms or any early symptoms.