The discloses a noninvasive ventilation mask capable of assisting in fiber bronchoscope interventional diagnosis and treatment and tracheal intubation via fiberoptic bronchoscopy under the condition of no air leakage and on the basis of ensuring continuous noninvasive mechanical ventilation. The noninvasive positive-pressure ventilation mask comprises a mask body, an air bag and a magnifying lens, the air bag can be guided by a fiber bronchoscope to be inserted into trachea intubation, and the magnifying lens can observe a whole process that an inserting structure enters the air bag and is inserted into the nasal cavity. The air bag is cone-shaped or boss-shaped and the like in a manner that the top of the air bag is larger than the bottom of the same, a round hole allowing the fiber bronchoscope to be inserted into or allowing the trachea intubation guided by the fiber bronchoscope is formed in the top of the air bag, and the top of the air bag can be turned up inwardly with the inserting structure and enters the mask body via the bottom of the air bag, so that distance from the top to the nasal cavity can be shortened.