For patients with kidney tumor who underwent kidney preservation surgery or nephrectomy, after all, one kidney is injured or lost, so they should take extra care of their only good kidney, pay attention to rest and avoid exertion in the first three months after surgery, especially for kidney preservation patients, 2-3 weeks after surgery is the period of easy bleeding, so they should be extra careful and avoid traveling. In addition, we need to pay attention to the following points in the diet: a. Low-protein diet Low-protein diet can reduce protein metabolites, thus reducing the burden on the kidneys, low-protein diet can also limit the intake of phosphate and potassium at the same time, low-protein diet can not only significantly improve the symptoms and test results, but also delay the progress of kidney disease and delay the decline of kidney function, so the recommended protein intake 0.6-0.8g/ (Kg body weight/day), and adjusted according to age and exercise. Second, low salt diet Restriction of sodium intake can be reflected in the reduction of systemic hypertension and the impact on renal hemodynamics and improve the effect of antihypertensive drugs, which can reduce the fibrosis of the kidney, in addition, sodium is an important causative factor of hypertension and proteinuria, so the intake of sodium should be actively restricted, and the recommended sodium intake is 7g/day. Third, drink more water Drink more water to increase the discharge of urine, which is not only conducive to the discharge of metabolic waste, dilute toxic substances, but also reduce the occurrence of urinary tract stones, conducive to the prevention and treatment of urinary tract infections, so it is recommended to drink 2000-3000ml of water daily, and to distribute evenly 24 hours, to avoid the lack of water at night. Finally, it is also necessary to avoid colds and flu, and to treat chronic diseases such as hypertension and diabetes as soon as they are detected, so as not to cause kidney damage.