To discuss the mechanism and efficacy of Professor Zhang Danings medication of using carbon agent to treat renal diseases. Methods: By collecting Professor Zhang Danings cases of chronic renal diseases which treated with carbon agent to observe their efficacy. Then refer to ancient and modern literature to discuss the mechanism of the medication. Results: Professor Zhang Danings medication can effectively enhanced kidney function, reduced urine protein and relieved the symptoms of hematuresis. Conclusion: Professor Zhang Danings application of carbon agent has significant efficacy.