Background <p>Submental intubation is commonly used in maxillofacial surgery since 1986.But this technique may be associated with a significant number of complications.Incision infection is one of the important ones, and will aggravate scar formation.</p> Methods <p>This observational prospective study carried out between 2020 and 2022, which involved 36 consecutive patients with submental endotracheal intubation treated in our hospital.Support and protect the submental passage with a Disposable Incision Protector.Explore its effect on complication rates.</p> Results <p>In all 36 patients SEI was successfully performed. The safety of the airway during the operation is guaranteed.No patient developed salivary fistula or experienced injury to the submandibular or sublingual glands or their respective ducts. There was no lesion of any nerve branch causing a motor deficit or paresthesia.All patients presented normal healing in the mucosa of the mouth floor. Postoperatively, only 1 patient (2.78%) of hypertrophic scar was reported, which was easily treated.</p> Conclusions <p>Disposable Incision Protector reduce complications without increasing risk.</p>