Low molecular proteinuria is due to the damage of renal tubular function, so that the protein reabsorption through the normal glomerular filtration is impaired. Nephrologists analyze that the amount of protein loss is not proportional to the severity of the disease. Patients with mild glomerular lesions, urine protein is not necessarily less, such as small lesion nephritis and mildly proliferative nephritis of the tunica albuginea, the renal lesions are mild, but the amount of urine protein per day can be up to a few grams or even more than a dozen grams. On the contrary, some focal segmental sclerosing nephritis and crescentic nephritis have severe pathological damage, but the amount of urinary protein may only be a few grams per day. Therefore, the good or bad treatment mainly depends on the type of renal pathology, the damage and the renal function. It also depends on whether the patient can cooperate with the doctor, pay attention to prevent the emergence of relapse triggers (such as cold, exertion, diarrhea, etc.), adhere to the treatment, and avoid the use of nephrotoxic drugs. Nephritis patients with a large amount of proteinuria, generally can be supplemented by diet, that nephritis patients can not eat protein-containing food is wrong, one-sided, even for chronic nephritis development to the advanced stage – uremia stage of the patient, also advocate to give to eat a high-quality low-protein diet. Daily protein intake should be controlled at 0.6-0.8 g/kg body weight. In patients with uremia, the amount of protein eaten daily should be increased to about 1.2-1.5 g/kg of body weight during dialysis treatment, especially when undergoing peritoneal dialysis. In patients with nephrotic syndrome, a large amount of protein is lost in the urine, and if renal function is normal, it is advocated to eat a high protein diet in order to correct hypoproteinemia, reduce edema and improve or enhance the resistance of the body. If azotemia occurs in patients with nephritis, or early renal insufficiency, the intake of protein should be limited. Otherwise, it will accelerate the deterioration of renal function. In short, different dietary recipes should be used for different conditions. When a large amount of proteinuria occurs in patients with kidney disease, there is no need to be overly panicked; when a small amount of proteinuria occurs, the severity of the condition should not be overly ignored, and it is best to diagnose the condition in a timely manner and formulate a corresponding program for the treatment of proteinuria. From the perspective of renal pathological damage to completely restore kidney function and eliminate proteinuria.