Air pipe blocking device

The utility model relates to the technical field of air pipe blocking devices, in particular to an air pipe blocking device which comprises a cylindrical blocking pipe, the interior of the cylindrical blocking pipe is divided into an air inlet bin and a connecting bin through a partition plate, an air inlet pipe communicated with the air inlet bin is arranged at the position, close to the top, of the outer wall of the cylindrical blocking pipe, and detachable filter cloth is arranged at the end of the air inlet pipe. A rectangular pipe is arranged in the air inlet bin, a strip-shaped air guide hole is vertically formed in the front side of the rectangular pipe, a threaded rod is rotationally connected to the middle of the top of the inner wall of the rectangular pipe, and a rectangular piston is in threaded connection with the outer wall of the threaded rod. According to the trachea plugging device, the threaded rod drives the rectangular piston to move up and down, so that the size of the strip-shaped air gu