In recent years, the K/DOQI expert group of American Kidney Disease Foundation put forward new suggestions on the staging method of CKD. As shown in the following table, patients with GFR ≥ 90 ml/min 1.73m2 and kidney disease are regarded as 1 stage CKD in this staging method, which aims to strengthen the cognition and early prevention of CKD. The staging description of GFR of chronic kidney disease [ml/(min 1.73 m2] indicates that the index of renal injury is 1 (+), GFR is normal > 90 GFR without abnormality, and the key diagnosis and treatment is 2. The index of (+)GFR in renal injury decreased slightly by 60? Slow down the progress of CKD and reduce the risk of cardiovascular disease. 3 GFR is moderately reduced by 30? Slow down the progress of CKD and evaluate the complications of treatment. 4 GFR is seriously reduced 15? 29. Comprehensive treatment to treat complications 5. Renal failure