This article presents data on the development of (chronickidney disease) CKD in children.In particular, with the pathology of the urinary system in children of different age groups.We analyzed the main clinical characteristics and laboratory parameters in children with pathology of the urinary system.The main parameters of the functional state of the kidneys were considered, the glomerular filtration rate (GFR) was calculated using the CKD EPI formula.The chronic pathology of the urinary systemin children was also analyzed.The course of CKD in children with various clinical nosological forms of kidney pathology was studied.