The stage of clinically massive proteinuria, diabetic nephropathy stage IV, occurs when routine urine tests in diabetic patients suggest urine protein at 1-2 +, excluding contamination as well as infections and other causes. If the patient is not treated by medication intervention, the maximum life expectancy is about 13 years. When patients are in diabetic nephropathy stage IV, it is recommended to use medication as early as possible, which can be used to control and alleviate the progression of renal failure through medication. There are many dietary considerations for diabetic nephropathy patients, namely low protein and low salt diet, because diabetic nephropathy patients have a large amount of proteinuria and need to limit protein intake. However, because the body needs protein intake, doctors will give different protein intake restrictions for different kidney disease patients.