The urine protein quantification test can accurately determine the total amount of protein contained in the urine for 24 hours. The specific method of urine retention is: the first urine is discarded in the morning, and the urine is retained until the same time on the second day (such as 6:00 a.m. to 6:00 a.m. the next day), the patient should collect all the urine for 24 hours and accurately record the total urine volume, which should preferably not exceed 1,500 ml, shake the urine well and take a vial of urine with a volume of not less than 30 ml for testing. It is worth noting that the appropriate amount of preservative should be added when the time between urine retention or urine retention and urine delivery for testing is too long in summer. When calculating the concentration of protein contained in 1000 ml of urine multiplied by the total urine volume, the total amount of urine protein excreted in 24 hours. If the daily urine protein quantification is less than 1.0 g, it is mild proteinuria, if the daily urine protein quantification is between 1.0-3.5 g, it is moderate proteinuria, and if the daily urine protein amount is more than 3.5 g, it is severe proteinuria.