Obstructive sleep apnea hypopnea syndrome (OSAHS), commonly known as snoring, is a disease in which upper airway obstruction occurs repeatedly during sleep and causes intermittent pauses in breathing, which is mainly manifested as snoring and breath-holding during sleep, headache and dizziness in the morning, drowsiness and fatigue during the daytime, and in severe cases, it can lead to elevated blood pressure, heart rate irregularities, angina pectoris, and even sudden death.The etiology of OSAHS is complex, and it is obviously correlated with many systemic diseases, often with each other, and has attracted much attention in recent years. OSAHS has a complex etiology and is associated with many systemic diseases, often as a result of each other, and its high morbidity rate seriously threatens the life expectancy and quality of life of human beings, and has attracted extensive attention in recent years. We will briefly review the commonly used treatments for OSAHS and discuss the effective treatment modes. I. Commonly used treatments and their limitations: 1. Conservative therapy, weight loss, strengthening exercise, quitting smoking, alcohol and other bad habits Since obesity is one of the risk factors for OSAHS, weight control can reduce apnea, but weight loss is not easy to adhere to easy to rebound. Quit smoking, alcohol and other bad habits, stop or reduce the use of sedative drugs, also help to relieve symptoms. Treatment of relevant medical diseases for the cause of OSAHS medical diseases, such as hypothyroidism, acromegaly, epilepsy, chronic granulocytic anemia, endocrine diseases, cardiovascular system diseases, etc., should be actively treated; drug therapy commonly used drugs include Protidine and medroxyprogesterone. Protidine is a tricyclic antidepressant, which can appropriately improve the symptoms of OSAHS and reduce the degree of low partial pressure of oxygen, but the side effects and incomplete efficacy of this drug limit its use. Methoxyprogesterone has limited therapeutic value for OSAHS and may be effective in patients with obesity hyperventilation syndrome with chronic hypercapnia. 2, oral orthodontic appliances In recent years, the use of oral orthodontic appliances for the treatment of OSAHS has become a hot spot in stomatology research and clinical practice. Upper airway and tongue, soft palate, jaw and hyoid bone and other structures are closely related, therefore, during the sleep period through the oral appliance to change the anatomical and functional relationship between the oral and maxillary system and the upper airway, expanding or stabilizing the airway, can achieve the purpose of eliminating snoring and apnea. Since oral appliances are comfortable to wear, easy to carry, safe and non-invasive, patients are generally willing to use them. We have observed that oral appliances are effective for patients with mild and moderate OSAHS, but less effective for patients with severe disease. 3.Continuous positive airway pressure ventilationContinuous positive airway pressure ventilation (CPAP) has become a very effective conservative therapy since it was first used in 1981. However, due to the discomfort of wearing it, the dryness of the mucous membrane of the oral and nasal cavities after a long period of time, and the noise of the machine, the patient’s compliance is poor, and it can be reduced by up to 46%. 4.Surgical therapy Uvulopalatopharyngoplasty (UPPP) It relieves the narrowing of the upper airway and improves the symptoms by shortening the soft palate, cutting off the palatine ptosis, and removing the excess mucous membranes and fatty tissues from the lateral and posterior pharyngeal walls. Due to the presence of multiple sites of obstruction within the upper airway in patients with OSAHS, this procedure cannot achieve satisfactory results without strict selection of indications. According to the literature 50% of patients are improved and only 41.1% or less are completely cured. Curved nasal septum, enlarged turbinates, enlarged tonsils or adenoids are prone to cause OSAHS, and the use of surgical treatment can effectively improve the patient’s symptoms. Tracheotomy it is the first successful surgical method to treat OSAHS, and its efficiency can reach 100%. However, it is difficult to be widely accepted because of the restriction of speech after surgery, which affects the quality of life, and it is easy to cause serious complications such as lung infection. Orthognathic surgery for OSAHS includes chinoplasty, mandibular anterior migration, combined anterior migration of the maxilla and hyoid, and chin anterior migration + hyoid muscle amputation and suspension. Orthognathic surgical treatment should be very careful in the selection of cases, and the following issues should be considered: it must be confirmed that the anatomical abnormality of the upper airway causes airway stenosis, and the obstruction is really located in the root of the tongue or the level of the soft palate as confirmed by the X-ray cephalometric measurement and nasopharyngeal fiberoptic microscopy, and it is obvious that there is a small lower jaw or mandibular retrusion deformity, the hyoid bone is low in the position, and conservative treatment is ineffective or the patients are not willing to adhere to the treatment, as well as the deformity or dysfunction of the face is not treatable by non-surgery. treatment, and the patient is able to tolerate larger surgeries. In summary, although there are various methods for treating OSAHS, due to the complex etiology and mechanism of the disease, no method can completely cure it fundamentally, and each method has its indications and limitations. We believe that, according to the individual differences of patients and their gills, “multi-stage surgery” to reconstruct the upper airway, combined with positive-pressure respiratory ventilation and the wearing of orthopedic appliances, has achieved satisfactory results. Patients were provided with diet plans to lose weight, advised to quit smoking and alcohol and other bad habits, and mild to moderate patients were advised to avoid sleeping on their backs and avoiding the use of sedatives.