Objective:To study the clinical characteristic and risk factors of non-alcoholic fatty liver disease.Methods:A retrospective study was conducted on 162 patients with non-alcoholic fatty liver disease from 2006.1 to 2009.12.Results:The symptoms of non-alcoholic fatty liver disease are not obvious,closely in association with obesity,diabetes,hypertension and hypertriglyceridaemia.Conclusions:Non-alcoholic fatty liver disease is a part of metabolic syndrome.