ObjectiveTo improve the clinicians’ understanding and treatment level of electrical status epilepticus during sleep by analyzing the clinical data of patients with ESES retrospectively.MethodsWe collected 20 cases from 2018 to 2019 diagnosed in our hospital by clinical and 24-hour video EEG confirmed and analyzed the clinical manifestations, EEG features, seizure type, classification of epilepsy syndrome as well as the imaging findings.ResultsAmong the 20 patients, there were 12 males and 8 females, the mean age was (10.96±2.68) years old, and the first onset age was (8.90±1.93) years old. Epilepsy seizure as the first symptom is most common, the EEG showed a broad or localized sustained discharge, generalized tonic clonic seizure is the main form of seizure type in most patients, ECSWS is the most prominent in the epilepsy syndrome, for small lesion through MR can be found early.ConclusionMost patients have partial or generalized seizures, which have a range of cognitive impairment, mental decline or other issues. It is important to improve the cognitive function, behavior, neuropsychology of patients by long term video EEG monitoring in the early stage.