Replacement sleeve for trachea cannula and using method

The invention provides a replacement sleeve for a trachea cannula and a using method, and relates to the field of medical aid. The replacement sleeve for the trachea cannula adopts a sleeve way; when the trachea cannula is replaced, a user only needs to sleeve the to-be-replaced worn trachea cannula with the sleeve body, after the sleeve body is moved to the designed position (the sleeve body is inserted into the incision of a patient), the worn trachea cannula is taken out, a new trachea cannula is inserted into the sleeve body and moves to the designed position, the sleeve body is taken out after the new trachea cannula is placed in place, and then repalcmenet of the trachea cannula is completed. According to the sleeving way, the problem that the new trachea cannula is inserted into the error position due to unfamiliar replacement operation is avoided, and replacement convenience is improved.