To explore the effect of treatment of clubfoot varus with Ilizarov external fixation and calcaneal lateral column shortening osteotomy in patients with spastic cerebral palsy.Methods Thirty patients of spastic cerebral palsy with clubfoot(42 feet)treated in ourhospital from January 2011 to June 2016 were selected.They were given rectangular osteotomy of the lateral column of calcaneus,Achilles tendon lengthening,anterior tibialis transferand Ilizarov external fixation.After operation,the patients were followed up forob servation of the morphological characteristics,the function ofankle jointand International Clubfoot Study Group (ICFSG)scores.Results Allpatients had successful surgeries.The operation time was(178.6 ± 42.1)min.The blood transfusion volumewas(74.8 ± 26.3)ml.The postoperative hospital stay was(9.7 ± 1.5)d.The follow-uptimewas(23.5 ± 3.0)m.There was no serious postoperative complication.The footdor siflexion angles atremoval of the Ilizarov external fixation and the end of the follow-up were greaterthan that before operation( p< 0.05),but the ICFSG scores were lowerthan those before operation ( p< 0.05).Conclusions Rectangu larosteotomy of lateral column of calcaneusis brilliantin thetreatment of clubfootin patients with spastic cerebral palsy.