The invention relates to a trachea cannula convenient to tooth combination and fixation. The device comprises a through pipe, an airbag pipe, a limiting sleeve, a movable frame, a movable block, a rubber clamp and a sleeve rod, the limiting sleeve is inserted into the outer wall of the circumference of the through pipe, the left side of the limiting sleeve is fixedly connected to the movable frame, sliding grooves are formed in the left side wall and the right side wall of an inner cavity of the movable frame, and a main push plate and an auxiliary push plate which correspond to each other aremovably connected into the sliding grooves and the movable frame. According to the trachea cannula convenient to tooth combination and fixation, the limiting sleeve is combined on the through pipe, apush frame is movably connected into the limiting sleeve through a bearing, and two ends of the push frame are controlled by the push plates. In the opening and closing process, the height of the movable block at the tail end of the push frame is changed, the movable block can carry a tooth sleeve to be released out of the grooves, the combined rubber clamp is used for sleeving and supporting upper teeth and lower teeth, and the push plates are fixed to the sleeve rod at a determined opening angle in a mode of rotating a sleeve rod nut. The trachea cannula can fix a through pipe, and guarantee smoothness.