Adenoid facies is a disorder of facial bone development due to adenoid hypertrophy. Complete or incomplete obstruction of the upper airway during childhood for various reasons may lead to changes in the child’s breathing habits. When children breathe with their mouths open for a long time, they may develop various dental and maxillofacial deformities, which are clinically manifested as “adenoid facies”. The symptoms are typical, and the diagnosis is usually made based on the clinical manifestations combined with relevant examinations. 1. Judgment according to clinical manifestations The child may have elongated jaws, high arched palate, uneven teeth, protruding upper incisors, thick lips, lack of expression, or “dementia face”. 2. Judgment according to auxiliary examination Lateral nasopharyngeal film, CT or magnetic resonance imaging of the nasopharynx can clearly show the enlarged adenoids. Once the adenoid face is formed, it is difficult to recover, so the prevention of the disease should be done, generally from the following aspects of prevention: 1, develop good habits, pay attention to hygiene, correct bad habits such as mouth breathing; 2, actively participate in exercise, enhance physical fitness, more fresh vegetables and fruits; 3, timely treatment of adjacent organ diseases, such as sinusitis, allergic rhinitis, otitis media, bronchitis, etc. Common diseases; 4, children with adenoid hypertrophy should be treated in a timely manner to avoid long-term adenoid hypertrophy that leads to the appearance of adenoid face.