Sputum collecting and separating device applied to bronchoscope

The sputum collection and separation device comprises a sputum collection bottle, a sputum suction pipe, a negative pressure air suction pipe and a rotary injection separation structure, and the rotary injection separation structure covers the open end of the sputum collection bottle in a sealing mode. After sputum is collected, a collected sputum sample can be separated into a test tube or a culture bottle without opening a sealing cover which covers the upper end of the sputum collecting bottle, that is, the sputum sample is completely separated from collection in a closed environment, so that the sputum sample is not easy to pollute; the sputum specimen inspection device effectively improves the accuracy rate of sputum specimen inspection, wins precious time for treatment work of a patient, in addition, the sputum specimen does not need to be separated into a test tube or a culture bottle through an injector after a sealing cover is opened, the whole operation process is simple, the labor intensity of medi