The invention relates to a device capable of simultaneously sucking secretion in a trachea and a trachea cannula and rinsing and cleaning the inner wall of the trachea cannula, which is characterized in that: the pipe wall of a suction catheter (1) is provided with at least three small pipes (2) which are parallel and equidistant; one end of each small pipe is opened on the pipe wall (3) of the suction catheter and has a distance of between 20 and 50 mm from a remote opening of the suction catheter, while the other ends of the small pipes are integrated into a pipeline (4) at the near end of the suction catheter, and the opening of the pipeline (4) can be connected with an injector; and the surface of the suction catheter is provided with a granulated scale (5). By rinsing and cleaning the inner wall of the trachea cannula at fixed positions, colonized bacteria and sputum crusts are prevented from appearing on the inner wall of the trachea cannula, the occurrence of ventilator associated pneumonia is reduced and the curative effect of mechanical ventilation is improved.