The steps of bronchoscopic biopsy for lung cancer are usually performed in the following order: first, clinicians suspect that the patient has an occupancy in the lung, and to make a clear diagnosis, bronchoscopy for biopsy is necessary. Doctors should prepare the patient’s mind well and do various tests before surgery, such as blood routine, coagulation function, pulmonary function and assessment of heart function, in order to clarify the lung and airway and other conditions and make adequate preparation before biopsy. Second, bronchoscopic biopsy is a relatively common clinical method used for the examination and treatment of respiratory diseases, in which a slender bronchoscope is implanted through the oral cavity and then through the nasal cavity into the patient’s airway, which can be observed directly under the fiberoptic bronchoscope. The tissue will be taken, dehydrated, transparent, waxed, embedded, sectioned, stained, sealed and other steps to make sections, which will be observed by the pathologist under the microscope, and according to the morphological changes of the lesion, when necessary, immunohistochemical staining may be done to assist in the diagnosis, and finally, according to its staining results, a pathology report will be issued for the diagnosis.