The most important and commonly used clinical indicators for renal function testing include the following: renal function, blood routine, urine routine, liver function, urological ultrasound, PTH, etc. If it is acute renal failure, it generally shows progressive increase of blood urea nitrogen and creatinine, not accompanied by kidney atrophy, etc. It is recommended to actively clarify whether it is prenephrosis, or nephrosis, postnephrosis and other factors, lift the cause, most of the renal function can be restored to normal. If it is chronic renal insufficiency, mostly accompanied by renal atrophy, anemia, PTH significantly higher than normal, etc., in this case, we recommend conservative drug treatment. If it has reached renal failure, with obvious electrolyte disorders, heart failure, etc., renal replacement therapy is feasible, such as hemodialysis, hemofiltration, peritoneal dialysis, etc.