Disposable trachea cannula

The utility model relates to the technical field of medical equipment, in particular to a disposable trachea cannula which comprises a catheter, an air bag, an air delivery pipe, a single connection ball and a pressure limiter. A spiral guide wire is embedded in the catheter, a depth mark is arranged on the outer wall of the catheter, a breathing machine butt joint part is arranged at the front end of the catheter, a fixator is tightly installed at the front end of the catheter in a sliding mode, an air port is formed in the tail end of the catheter, an air bag is arranged on the outer wall of the tail end of the catheter, and an air conveying pipe and a liquid suction pipe are fixedly connected to the catheter. The front end of the air delivery pipe is respectively connected with an air inlet pipe and an air outlet pipe, the air inlet pipe is connected with the single connection ball, and the air outlet pipe is connected with the pressure limiter. The air bag is inflated through the single connection ball, i