Abstract. Prevalence of congenital abnormalities varies from 3.5% up to 43% in paediatric. Such wide interval due to only small numbers of research has been done. Limitation of data on recurrent urinary tract infection in CAKUT infants as well as symptoms which resembles other diseases make it quite a challenge. Aprospective cohort is conducted to analyze the prevalence of recurrent UTI among CAKUT in children at Neonatal and Nephrology Paediatric Department of H.Adam Malik Hospital from 2016 to 2017. Urinalysis and urine culture are used to assess the presence of UTI. Result showed that the prevalence of UTI in CAKUT patients reached 64% in which 52% is onstructive type and 12% non-obstructive type. Pelvic ureteric junction obstruction is the most common cause. Children with known urinary tract problems such as CAKUT are very prone to developing recurrent UTI.  Due to a low survival rate of children with ESKD, new strategies are needed to prevent CAKUT, preserve renal function, and reduce associated cardiovascular morbidity. Meanwhile cchildren with CAKUT requires a multi disciplinary and longer follow up.