Fiberoptic bronchoscopy involves extending a thin, light-guided fiberoptic bronchoscope through the mouth or through the nose into the patient’s lower airway, passing through the voice box into the trachea and bronchi and further distally, to directly observe tracheal and bronchial lesions and perform appropriate examination and treatment according to the lesions. The current clinical application of bendable bronchoscopes is divided into fiberoptic bronchoscopes and electronic bronchoscopes. Electronic bronchoscopy is more commonly used, and fiberoptic bronchoscopy is mainly used for bedside aspiration, etc. Fiberoptic bronchoscopy is an endoscopic examination technique applied in the 1970s, which is widely used clinically and can make many lesions hidden in the trachea, bronchus and deep parts of the lung or diseases that are difficult to be found in the deep parts of the lung to be diagnosed and treated without body surface trauma, so that many patients are exempted from the pain of surgery, and fiberoptic bronchoscopy plays an important role in the diagnosis and treatment of lung diseases.