The utility model discloses a sucking gun for otolaryngology diagnosis and treatment. The sucking gun for otolaryngology diagnosis and treatment comprises a gun head (1), a gun shell (7) and a gun head dislocation device, wherein the gun head (1) is a disposable gun head, a gun opening part at the front end of the gun shell (7) decreases gradually to form a conical abutting connection head, and the conical abutting connecting head of the gun shell (7) is matched with an abutting connection port of the gun head (1). The gun head dislocation device is composed of a dislocation ring (2), an operation rod (3), a spring (4) and a button (5), and the disposable gun head (1) can be pushed down to a dirt bucket by pressing the button (5). According to the sucking gun for otolaryngology diagnosis and treatment, abutting connection and separation of the gun head (1) can be achieved by one hand, and therefore diagnosis and treatment efficiency and medical safety can be effectively improved.