Renal atrophy suggests active treatment of primary diseases, such as hypertension, diabetes, vasculitis and other underlying diseases. The diet should pay attention to low salt and high quality low protein diet. low salt means avoiding foods with very high salt content, it is recommended that the salt intake is less than 3g per 24 hours. high quality low protein means animal protein, avoid eating peanuts, walnuts and beans. You can eat one egg, one bag of milk and two taels of lean meat daily, avoid spicy and stimulating diet, and you should take oral kidney-protecting drugs, such as Jin Shui Bao, Bai Ling capsule and Hai Kun Kidney Xi capsule. Every 3-6 months, we should review the kidney function, blood and urine routine to prevent the disease from progressing and causing irreversible consequences.