Functional trachea cannula

The invention relates to a functional trachea cannula. The functional trachea cannula comprises a trachea cannula body, and further comprises a fixing sleeve, a connecting assembly, a fastening assembly, a slide rail assembly, a tooth cushion assembly and a limiting assembly, wherein the fixing sleeve sleeves the trachea cannula body, and is composed of a first arched structure and a second archedstructure which define a through hole structure allowing the trachea cannula body to penetrate through; the connecting assembly is used for connecting the first arched structure with the second arched structure; the fastening assembly is used for fastening the fixing sleeve on the trachea cannula body or loosening the fixing sleeve from the trachea cannula body; the slide rail assembly is used for sliding the fixing sleeve along the trachea cannula body back and forth and limiting the fixing sleeve; the tooth cushion assembly is arranged on the fixing sleeve and is used for teeth holding-on;the limiting assembly is a