ObjectiveTo understand the prognosis of infantile spasm through long-term follow-up. MethodsChildren with infantile spasm diagnosed and treated in Children’s Hospital from January 2010 to December 2015 were retrospectively analyzed. Clinical data were collected and telephone follow-up was conducted. ResultsA total of 169 cases were collected, and only 59 cases were successfully followed up, of which 13 patients were allowed to attend school. 38 patients were not allowed to go to school, 8 patients were dead. In the group that did not go to school, 17 of them could not walk, accounting for 44.74% of the non-school attendance group, 27 of them could not run, accounting for 71.05% of the non-school attendance group. There are 33 caese who could only depend on family care instead of themselves, accounting for 86.84% of the non-school group.There were 36 children who could not speak simple sentences, accounting for about 94.74%. In addition, in terms of seizures, there were 15 patients seizure-free for more than 5 years, accounting for 29.41% of the survival group. ConclusionThe long-term prognosis of infantile spasm was poor, the mortality rate was 13.56%, the school attendance rate was 25.5% in the survival group, and the self-care ability of the non-school attendance group was poor. The normal development at the onset of the disease and the early control of epilepsy without seizures are the important prognostic factors of the disease.