The bacteria of intestinal produce toxins as phenols and indoles were more in patients with chronic kidney disease than healthy people, these metabolites will accelerate cardiovascular disease, deteriorate renal function and bone disease in patients. The two goals of treatment for flora imbalance in patients with chronic kidney disease: adjust the bacteria flora of the colon and reduce bacterial fermentation to produce metabolic end product. Prebiotics, such as dietary fiber, resistant starch, and oligosaccharides, and probiotics, such as lactobacillus, streptococcus, and bifidobacteria, can help to achieve those goals. It is recommended that the patients should increase the intake of prebiotics and use probiotics to protect the function of the gastrointestinal tract and reduce uremic toxins.