The main focus of sleep epilepsy recognition lies in the differential diagnosis with other common sleep disorders in order to avoid incorrect treatment. The basic point of differential diagnosis is firstly to be familiar with the clinical features of each of these disorders, and the key method to confirm the diagnosis is EEG examination, especially natural sleep EEG or long-range EEG monitoring. It is advisable to perform PSG at the same time, which can assist in the diagnosis of general sleep disorders on the one hand, and increase the detection rate of epileptiform discharges in sleep-related epilepsy on the other hand, and help to determine their relationship with sleep cycles. In some sleep-related epilepsies, the frequency of epileptiform discharges is closely related to the sleep cycle. We have studied the circadian pattern of epileptiform discharges in BECT and confirmed that the frequency of discharges averages 4.5 discharges/min during the waking period and up to 27-50 discharges/min during the all-night NREM period, with some cases showing features of ESES and abnormal discharges of up to 20 discharges/min or more during REM sleep. Most cases of ADFLE have been mistaken for night terrors or other sleep disorders in the past. The main clinical feature is a highly variable behavioral abnormality during nighttime sleep. Common symptoms include sudden eye opening, awakening, or panic attacks during sleep, often with dystonia or other motor disturbances, and in a few cases, sleep-related aggressive behavior. Seizures can be frequent throughout the night, up to dozens of times. In about 30% of cases, the EEG shows abnormal discharges in the frontal region, and in about half of the cases, the EEG only shows rhythmic slow waves in the anterior head, and in 10% of cases, the EEG shows diffuse background activity flattening during the seizure. PSG monitoring confirms that seizures occur during slow-wave sleep (NREM stages 2-4), with a few seizures during waking hours. More than half of the children have daytime neuropsychiatric abnormalities, including difficulty waking up in the morning, fatigue, and excessive daytime sleepiness. Recurrent seizures can be extremely damaging to human nerve and brain function, and sleep epilepsy is easily misunderstood or ignored because its seizures occur during sleep, and therefore should be taken seriously. If the abnormal manifestations described in the article are found, medical attention should be sought in time to avoid further damage.