Tracheostomy tube plugging device

A tracheostomy cannula plugging device relates to the technical field of medical instruments and comprises a first cannula, a second cannula and two fan-shaped sealing sheets. The lower end pipe opening of the first sleeve and the upper end pipe opening of the second sleeve are in butt joint in a detachable mode, the lower portion pipe section of the second sleeve is in an arc shape, and the pipe diameter of the lower portion pipe section of the second sleeve is gradually decreased from top to bottom. An in-pipe support is fixed to the upper portion of an inner cavity of the first sleeve, and an in-pipe supporting column is arranged on the in-pipe support. The fan-shaped sealing piece is composed of a fan-shaped face and two fan ribs, the fan-shaped face is a fan-shaped airtight soft piece, the inner ends of the two fan ribs are connected with the upper end of the in-pipe supporting column in a pivoted mode, and the outer arc edge of the fan-shaped face and the outer ends of the two fan ribs are inserted into