Abstract: New classification system of eight regions in the central airway was suggested according to  the author′s  experience in recent years. Bronchial tumor could be divided into four types of introluminal，mural， extrinsic compression and mixed corresponding to the location between the tumor and the bronchial wall. Debarlking of the tumor was frequently used in the introluminal and mural types， then the stent was not necessary to be placed if airway was unimpeded. Stent should be implanted in the extrinsic compression and mixed types so as to relieve the strictures. The new classification and diagnosis system are helpful to guide the interventional   bronchoscopy.

Key words: tracheal neoplasms, bronchoscopy