If the patient is congenital renal atrophy, renal function is not abnormal, there is no need to avoid food; if it is chronic renal failure caused by renal atrophy, avoid food mainly includes high salt, high fat, high potassium, high phosphorus and other foods, and at the same time, need to limit the amount of protein food intake. 1. High salt: such as salted vegetables, all kinds of pickled food, and salty snacks. Eating too much high-salt food may increase the burden on the patient’s kidneys, aggravate edema, cause high blood pressure, and in severe cases, may even lead to acute left heart failure. 2. High fat: such as fried, animal fat food, etc. Eating too much high-fat food, aggravate gastrointestinal burden, and may aggravate hyperlipidemia. 3. High potassium: such as Chrysanthemum coronarium, black dates, pea shoots, etc. Because kidney disease can lead to potassium metabolism disorders, hyperkalemia is easy to cause the risk of cardiac arrest, so patients with renal failure should be strictly limited potassium intake. 4. High phosphorus: such as mushrooms, nuts, dairy, etc. High phosphorus can easily lead to renal osteodystrophy. 5. Limit protein food intake: limiting protein diet can reduce the generation of nitrogenous metabolites and alleviate symptoms and related complications. You can eat a moderate amount of high-quality low-protein food, such as eggs, milk and lean meat. If you find patients with renal atrophy, it is recommended to go to the regular hospital in time, under the guidance of the doctor standardized treatment.