What food can be eaten with only one kidney mainly depends on whether the renal function is normal or not. If renal function is normal, there is usually no obvious dietary contraindication; if renal function is abnormal, you can eat a moderate amount of high-quality protein foods such as eggs, milk and lean meat, such as the combination of moderate and severe renal insufficiency, but also a low-protein diet, and more vitamin and mineral-rich fruits and vegetables, such as pears, peaches, tomatoes and so on. Although the patient has only one kidney, but renal function is normal, usually no obvious dietary contraindications, dietary nutrition can be adequate and balanced. However, we should pay attention to avoid bad habits, such as staying up late, smoking and drinking alcohol, and try not to hold urine to avoid damage to kidney function. If the patient has only one kidney, but the renal function is abnormal, you can moderate consumption of high quality protein food such as eggs, milk and lean meat, etc.; if combined with moderate to severe renal insufficiency, you also need to pay attention to the low protein diet; at the same time, you can also moderate consumption of fruits and vegetables rich in vitamins and minerals, such as pears, peaches, tomatoes, etc.. If the patient has only one kidney, it is recommended to go to regular hospitals regularly to improve the renal function related examination, and the professional doctor will prescribe and evaluate the examination results, if abnormal renal function is found, standardize the treatment under the guidance of the doctor.