The most common clinical cause of children’s severe snoring is open-mouth breathing due to adenoid hypertrophy, snoring at night during sleep, and severe apnea and suffocating awakening. A lateral nasopharyngeal film or CT of the nasopharynx or multi-functional fiberoptic nasopharyngoscopy can show the size of the adenoids. If adenoid hypertrophy causes severe clinical symptoms, endoscopic adenoids power system resection under general anesthesia or endoscopic transoral plasma adenoids ablation under general anesthesia is performed. After adenoidectomy, the snoring symptoms disappear at night and the results are obvious. Children with severe snoring usually also have enlarged tonsils bilaterally, and severe third degree enlargement. In order to better improve the space in the nasopharynx and oropharynx, it is clinically necessary to consider whether to remove the tonsils according to the situation.