Common causative factors of pharyngeal stenosis include diseases such as hypertrophy of the palatine tonsils, hypertrophy of the soft palate, hypertrophy of the lateral pharyngeal wall, overgrowth of the uvula, hypertrophy of the root of the tongue, hypertrophy of the tongue, and postoperative scarring. The poor structure is usually improved by surgical treatment. 1. Oropharyngeal plane obstruction: feasible hanging palatopharyngoplasty and modified surgery, hard palate truncation and soft palate anterior displacement, implantation of soft palate columns, tongue root traction, hyoid bone suspension, upper airway low-temperature plasma perforation ablation and other ways of treatment. 2. Postoperative scar: pharyngeal surgery such as adenoidectomy, tonsillectomy and nasopharyngeal tumor resection, etc., if the damage to the mucosa and soft tissue is too much, postoperative scarring stenosis can occur. Pharyngeal mucosal flap repair, tongue tissue flap repair, soft palate flap repair and other methods can be used to solve the problem respectively. Oropharyngeal cavity consists of soft tissue, no cartilage or bony scaffolding, pharyngeal stenosis etiology is also more, the specific treatment should be in the specialists to clarify the diagnosis and etiology of reasonable choice.