The time to remove the trocar after laryngeal cancer surgery mainly depends on the type of surgery. Most of the partial laryngectomy surgery can take the cannula about 48 hours after surgery, while the cannula of total laryngectomy surgery needs to be retained for a long time.1. Partial laryngectomy surgery: In case of partial laryngectomy surgery, the anterior cervical tracheal cannula retained after surgery is the respiratory channel before the recovery of the surgical area, and before removing the cannula, a cannula trial blockage should be performed. If the patient is still able to live and sleep normally after 48 hours of tube blocking, it can usually be removed. However, if the patient shows symptoms of dizziness and poor breathing during the blocking process, the trocar cannot be removed in this case and the trocar may need to be retained for a long time; 2. Total laryngectomy: In the case of total laryngectomy performed by total laryngectomy, the patient’s laryngeal structure is no longer available at this time and the trachea is directly sutured to the skin of the neck, the trocar needs to be retained for a long time and the trocar needs to be cleaned and disinfected regularly to keep it open The trocar needs to be cleaned, disinfected and kept open regularly. After removal of the tracheal cannula, the wound healing should be observed. However, care should be taken to prevent infection at the wound site. If the patient has difficulty in breathing within 1-2 days after the cannula is removed, he/she should seek medical attention promptly.