Abstract： Objective To explore the correlation of pathological subtypes and surgical outcomes in intractable epilepsy due to focal cortical dysplasia(FCD).Method The data of the pathological subtypes and surgical outcomes in 54 patients of FCD proved by pathological examination were reviewed retrospectively.The relationship between pathological subtypes and surgical outcomes was analyzed.Results Of 54 cases,24 were classified as the mild group(FCD Ⅰ A),30 the severe group(FCD Ⅰ B + Ⅱ A+ Ⅱ B).The effective rate of FCD surgery was 96% in the mild group,while 70% in the severe group,with the total effective rate 82%.Conclusions The severer the histological lesion of FCD,the worse the surgical outcome.FCD may be one of the important factors influencing the postoperative outcomes of intractable epilepsy.