Trachea cannula fixer for preventing lip pressure injury

The utility model discloses a trachea cannula fixator for preventing lip pressure injury, which comprises a cannula fixing tube, a bite portion and a cannula limiting clamp, the bite portion comprises a bite portion shell, a silica gel denture, a spring, an arc-shaped abutting piece, a rotating rod, a gear and a rack, the bite portion shell is of an annular hollow cavity structure, and the rotating rod is arranged in the hollow cavity structure. The spring is fixedly arranged on the inner side wall of the bite part shell, the rack is fixedly connected with the spring, the silica gel denture rotatably penetrates through the outer side wall of the bite part shell and is fixedly connected with the rack, the gear is rotatably hinged to the outer side wall of the bite part shell, the gear is meshed with the rack, the gear is fixedly connected with one end of the rotating rod, and the other end of the rotating rod is fixedly connected with the rack. The other end of the rotating rod slidably penetrates through the