Tracheotomy for 2 years can not be sealed by using half blocking tube excessively, replacing the metal cannula and actively treating the primary disease. 1. Half-blocking tube overload: be careful when blocking the tube, don’t block it completely at one time, after 24 hours, block 3/4 or all of it, after 24-48 hours, if there is no breathing problem, you can pull out the tube. 2. Replacement of metal cannula: Because when using disposable plastic tracheal cannula in tracheotomized patients, sputum crusts will be produced, which will cause blockage of the lumen, while the inner wall of the metal cannula can be removed and cleaned as well as replaced at any time, which is not easy to be blocked. The diameter of the catheter can be adjusted to a smaller diameter and slowly adapted. 3. Actively treat the primary disease: Active treatment of the primary disease to remove the root cause of the airway obstruction is the only way to remove the tracheal tube. It is recommended to go to the hospital as soon as possible for follow-up, so that specialists can evaluate and decide the timing of sealing and removing the tube.