Children have great differences from adults in growth, development, metabolism, respiratory physiology, sleep-wake rhythm, etc. Some of them have sleep snoring signs, but they also have certain specificities in etiology, clinical manifestations, diagnostic criteria and treatment effects. Sleep-related respiratory disorders in children are divided into three types: simple snoring, obstructive apnea hypoventilation syndrome and upper airway resistance syndrome, and the clinical symptoms and signs of children do not always accurately reflect the severity of the disease. Most children snore as simple snoring and are not characterized by changes in sleep structure, alveolar hypoventilation and hypoxia. Most children have loud snoring sounds during sleep, typical apnea or partial obstruction of the upper airway with hypoxia; however, some children do not have obvious snoring symptoms, and the father may observe obvious wheezing after respiratory intervals. Children with upper airway resistance syndrome have increased upper airway resistance during sleep, mostly during rapid eye movement sleep, resulting in negative intrathoracic pressure fluctuations during inspiration, increased respiratory movements, brief awakening and sleep fragmentation, but normal nasal and oral airflow and oxygen saturation, and no apnea and hypoventilation. These three sleep-related breathing disorders may co-exist or alternate in the same child at different times due to changes in factors such as upper respiratory tract infection or sleep position. Although, there are similar pathophysiological changes in children and adults, clinicians must clarify the distinct differences in diagnosis and treatment between the two to avoid underestimation.