The normal value of urinary protein creatinine ratio is 10-25mg/mmol. In some renal diseases, urinary protein is a very important factor in the aggravation of renal function, so the evaluation of the amount of urinary protein is very important and also determines the choice of treatment, such as the need for the application of hormones and immunosuppressive drugs. The most commonly used method to measure the amount of urine protein is the 24-hour quantitative urine protein test, but the disadvantage is that it is not very convenient to operate, the patient’s compliance is relatively poor and easily affected by the patient’s urine volume. Another method is better is to measure the ratio of urinary protein to creatinine at a certain moment, which does not require patients to collect urine for 24 hours and is not easily affected by the patients’ 24-hour urine volume, so it is more and more widely used in clinics, and if it is more than the normal value, it suggests that the patient’s kidneys may have a problem.