The kidney is a “filter” consisting of many capillary spheres, sacs and tubes. About 1200ml of blood flows through the kidneys every minute, accounting for a quarter of the blood in the body. In this process, the metabolites such as urea, uric acid, creatinine and many other degradation products of drugs are excreted from the body with urine, while the proteins, glucose, red blood cells, white blood cells and other substances in the blood are retained. The kidney is responsible for excreting metabolites and regulating water, electrolytes, acid-base balance and maintaining the relative stability of the internal environment. At present, the easiest and most widely used method to check kidney function is still blood and urine examination. Especially in the vast number of towns and rural areas in China. Abnormal urine can reflect various pathologies of the kidney, and the levels of creatinine, uric acid and urea nitrogen in the blood show the severity of the damage to kidney function. Various primary or secondary renal disorders, such as chronic nephritis, chronic pyelonephritis, hypertension, diabetes, small renal arteriosclerosis, atherosclerosis and connective tissue disease, cause chronic progressive destruction of the kidney and eventually develop into chronic renal failure, also known as chronic renal insufficiency. The kidney has a huge potential. Usually the body uses only about 30% of the total kidney function. When the kidney tissue is damaged and part of the kidney tissue is lost, as long as more than 30% of the tissues can still work normally, the blood creatinine can still be within the normal range and the person can have no other discomfort except some symptoms of kidney deficiency such as back pain, tinnitus, fear of cold, weak knees, weakness, impotence, premature ejaculation, etc. Only when there is more than 70% loss of kidney function, the concentration of creatinine retained in the blood exceeds 110umol/L. According to the blood creatinine value, chronic renal insufficiency is divided into four stages: early stage of renal insufficiency with blood creatinine less than 133umol/L, azotemia stage with blood creatinine between 133umol/L and 221umol/L; renal failure also known as early stage of uremia with blood creatinine between When the condition progresses to advanced uremia, many patients need hemodialysis, peritoneal dialysis, and in some cases, kidney transplantation to save the patient’s life. In chronic renal insufficiency, the combination of Chinese medicine to warm the spleen and kidneys, remove blood stasis and drain turbidity, clear heat and detoxification, and activate blood and water can stop or delay the further deterioration of uremia, and in the early stage, the destruction of some kidney tissues is still in a reversible borderline state. Some patients with blood creatinine slightly higher than 110umol/L mistakenly believe that their disease has only started, and their condition is light, so they do not pay attention to take care of it and do not actively treat it, thus losing the opportunity to gradually worsen their condition, which leads to a big disaster.