The gut microbiota of healthy human is an extremely complex bacterial symbiosis with more than 100 trillion bacterial cells and covering 1000 strains of various species. The clinical studies in recent years have shown that gut microbiota changes induce small intestinal bacterial overgrowth, chronic kidney disease, cardiovascular disease, obesity, non-alcoholic fatty liver disease, rheumatoid arthritis and even depression. Reports of research in the past 10 years have also shown that renal function and its sequelae may be caused by changes in composition and amount of gut microbiota, leading to systemic inflammatory responses in patients with chronic kidney disease.