Abstract: Hematuria is a common problem in children, and a high prevalence of asymptomatic haematuria was found in early screening for chronic kidney disease (CKD). The causes of disease are complex, so long-term follow-up and management are very important. Meanwhile, renal biopsy indication of asymptomatic microscopic haematuria is an controversial issue. Epidemiological studies will provide scientific information with guiding roles and application values for asymptomatic haematuria, especially CKD.